Updated the default theme.
Merge branch 'development' of https://github.com/aptana/studio3 into development

Conflicts:
	plugins/com.aptana.theme/src/com/aptana/theme/internal/preferences/ThemerPreferenceInitializer.java
TISTUD-5662 Windows: Font size
  - Modify the font sizes for tabs to be different on each OS. 14 on Mac, 11 on Windows, 12 on Linux. Use Segoe UI font on Windows, PT Sans on Mac, don't specify font on Linux.