Eclipse SDK 4.5.1

What's new in this version:

Improve support for GTK+ 3:
- Luna provided GTK+ 3 support for an initial set of platforms. With this release we will improve the support for GTK+ 3 and enable it on even more platforms, especially for GTK+ versions >= 3.10.x. [SWT] (441566)

Drop support for GTK+ 2 versions older than 2.18:
- The GTK port has grown a too big range of supported GTK versions. Reducing them will allow streamlining our code base, making it easier to fix things and to attract new contributors. Support for versions older than 2.18 will be dropped. [SWT] (446454)

SWT browser currency:
- Significant work is required in the SWT browser widget to support the latest browser runtimes. As part of this effort we will add browser support for XULRunner 31 on all platforms. [SWT] (437700)

Add support for Power 8 Linux LE platform:
- We want to add support for the Power 8 Linux LE platform. This requires changes in SWT and the launcher. [Equinox, SWT] (431230, 431232)

Work on Eclipse support for Java 9:
- The next Java SE release is version 9, which is currently scheduled for early 2016. This Java release will add modularization to the Java language, also known under the code name Jigsaw. The Mars release itself will not provide any support for Java 9. [JDT and PDE] (456778)

Continuous improvement of build, and build process:
- We will continue to improve our build, and our build process. This is to some extent a continuation of the CBI related work from last release (372792) but not limited to CBI issues. [Platform Releng] (434596)

Recruit and train new contributors:
- We will continue the work we started in Luna (422762) to reduce any real or perceived barriers to contribution, and increase efforts on reviewing patches and mentoring new contributors, with the goal that they become active committers. [All components] (441565)

Performance and stability of Platform user interface:
- Version 4.4 of the Eclipse Platform still has some performance and functional shortcomings compared to the old 3.x generation of the platform. We will work to root out and eliminate these remaining bugs to increase the overall quality and performance of the 4.x generation platform. This was already a 4.4 plan item (422467) but it got deferred. [Platform UI] (441512)

Revive performance tests:
- After the migration to CBI and build.eclipse.org, our performance tests stopped working. With this release we want to create a stable performance test infrastructure and bring back to live at least the most relevant performance tests. This was already a 4.4 plan item but it got deferred. [Platform Releng] (374441)

Surface more options on the Tracing preference page (new):
- We have been observing a number of bugs reported regarding intermittent behavior of low level parts of Eclipse Platform like builders, resource listeners, jobs, etc. Usually those problems are hard to reproduce and there are no steps to trigger it. Therefore, we want to make more options available on the 'Tracing' preference page, so that they can be enabled by the user in the currently running workspace where the problem surfaces. [Platform Resources, Platform Team, JDT Core and JDT UI] (441575)