Stellarium 0.19.0

What's new in this version:

Added:
- new type of computation for AstroCalc/Phenomena tool
- GUI options to change constellations and asterisms font size
- new source to star names and added new additional name to kappa Scorpii
- tool to detect Intel C/C++ compiler in our Logger
- new method into ConstellationMgr class - getConstellationsEnglishNames() to get English names of all constellations in the selected sky culture [Scripting Engine]
- new one script 'Constellations Tour' to organize the tour around constellations of the loaded sky culture [Scripting Engine]
- constellation boundaries for Chinese Skyculture
- more values to correctly detect MSVC version
- few scriptable methods into HighlightMgr class to manage highlight points
- translation support for strings within scripts
- Chinese medieval sky culture
- Alipurduar town (West Bengal; India) to the default locations list
- extra check-point for data directory in the StelFileMgr class
- DSO textures
- sensor crop overlay to Ocular plugin
- tool for allow filetype selection for Screenshots
- core.getPlatformName() and core.isMediaPlaybackSupported() methods into scripting engine
- scripting function isModuleLoaded()
- graph "Transit altitude vs Time" into AstroCalc/Graphs tool
- small simplification to scripting through adding master switch by types for grids, lines and points on the sky [Scripting Engine]
- showing labels for named highlights
- allow setting location of User Data Dir via environment variable.
- scripting graphics tool [Scripting Engine]
- LMC and SMC as addition names for Magellanic Clouds
- classifications support for sky cultures
- support 2 southern deep sky catalogues (NGC subset; esp. for southern observers)
- armintxe, paleolithic sky culture and landscape
- demo script for martian analemma [Scripting Engine]
- support sols for setDate() method [Scripting Engine]
- code, who indicate to hybrid graphics systems to prefer the discrete part by default
- support for constellation boundaries thickness
- Maya constellations
- 2 Babylonian skycultures
- display of used (terrestrial) timezone for observation from extraterrestrial locations
- special case for Satellites plugin: use texture for draw the crossing of the ISS of the Moon or the Sun
- nightly illumination plus basic description for armintxe landscape

Fixed:
- Ependes Observatory location
- scaling the distance in AstroCalc
- naming the stars in AstroCalc tool when non-western skyculture is enabled
- sorting of column Distance in Astronomical Calculations' Ephemeris tab
- wrong calculation the FOV of CCD in Oculars plugin
- compile Stellarium without media features
- behaviour of script (The old script 'Constellations Tour' was renamed to the 'Western Constellations Tour' and updated) [Scripting Engine]
- documents for core.clear() method [Scripting Engine]
- unit tests failure on Windows and some linuxes
- the user interface problems for lenses in Oculars plug-in
- copyright years in CREDITS.md file
- checker in the StelFileMgr class
- macOS User Data Directory in documentation
- bug report address for .desktop translations
- a typo in Scenery3D plugin
- selecting LMST, LTST and system_default timezone names
- math error in StelHips
- a potential memory leak in libtess
- error for ephemeris calculations time window
- description data for textures.json
- missed translatable strings in StelSkyCultureMgr class
- CWE-404 issues
- crash when script tried delete already deleted labels
- zooming behaviour
- time zone issue in AstroCalc/WUT tool
- DSO texture overlay issue
- FTBFS issue on some linux systems
- bad behaviour time zones in the location panel
- crash when selecting certain dates in 1 AD for some time zones on Windows
- default limits for graph "Transit altitude vs Time"
- translation the "Armintxe Cave" string
- airmass calculation for deep-sky objects

Changed:
- default constellations font size
- HiPS behaviour: don't show tile if it is hidden by children
- behaviour of version checker: introduced the additional check for latest version
- behaviour of the BottomStelBar::updateText() method

Updated:
- Reingold and Dershowitz algorithm of DeltaT (New algorithm was taken from the Calendrical Calculations: The Ultimate Edition book)
- cmake rules for ICC/ICPC support (Intel C/C++ compilers)
- GUI in Oculars plugin
- Stellarium User Guide
- technical documentation
- Amalthea texture
- scripts (added i18n support)
- scripting API: added format specification for screenshots
- the code (thanks for PVS-Studio to the finding an issues)
- DSO textures
- textures of LMC
- nomenclature
- jquery and jquery-ui in Remote Control plugin
- scripting engine: MilkyWay saturation scriptable now
- scripting engine: expanding the core.clear() method
- Satellites plugin: harmonized function name, added a property [Scripting Engine]
- KoreanCM.isl file - typofixes
- RemoteSync plugin: suppress unsuitable properties
- AstroCalc/WUT tool: optimizations
- AstroCalc/Positions tool: optimizations
- AstroCalc/Phenomena tool: optimizations
- contact info for plugins
- Sterngarten model description
- behaviour of the options on Starlore tab
- list of extraterrestrial locations
- time zones behaviour: make custom time zone use a full property of StelCore
- time zones behaviour: preserve custom timezone setting
- LocationDialog behaviour: Return to default location resets location list.

Removed:
- a long time abandoned incomplete LogBook plugin
- old deprecated methods in scripting engine
- languages without translators and with translations lesser than 1%