+ simplified toolbar button separators
+ added hover and pressed states for toolbar buttons to improve user experience
+ partial fix for button with icons inside Task panel
+ fixed styles for fields inside a table cell
1. Enhanced TestApp.py to return the unittest TestResult object to the calling method
2. FreeCADTest.py now checks the TestResult object. If all tests pass, FreeCADTest.py exits with a 0 however if any tests fail, then it exits with 1. FreeCADTest.py calls os._exit() with the exit code instead of sys.exit() because Base::Interpreter:SystemExitException intercepts sys.exit() calls and swallows the exit code so there is no way to propogate the non-zero code from the python test cases through the interpreter to the shell in the current call stack.
* display originals in tree under the features (like Part Fuse does)
* unhide originals upon delete
* display message box when computing the feature fails on creation
1. Set python dependency paths in Application Bundle adhering the Homebrew convention of installing them in prefix/libexec
2. Add appdmg configuration to produce an os x disk image for FreeCAD application distribution
3. Added a Tools convenience script to produce an archive name from a serialized Version.h file using the convention FreeCAD_{Major Version Number}.{Minor Version Number}-{Git Revision Count}.{Git Short SHA}-{OS}-{Arch}
+ fixed background logo for Win and Linux
+ improved QToolBar handle for different icon sizes (selectable by user inside Preferences)
+ tweaked editable fields inside QToolBar in order to work for all icon sizes (selectable by user inside Preferences)
+ fixed Ubuntu problem that caused a blank line inside up/down buttons of QSpinBox and similar
+ tweaked Python Editor color for Light theme
+ fixed buttons margin/padding inside Task tab
+ tweaked color for checked QPushButtons inside Draft WB for better user experience
