[BUG #7042] new feature overview page for the generator
skip test packages listed in 'ignore' URI parameter
[BUG #7041] Master Page Transition in Page Manager on Tablet 


* Added Getter method for Detail and MasterContainer, for being able to activate page transition on tablets.
[BUG #7042] add entries for contributions and inspector
Merge remote branch 'origin/master'
Minor test fix.
[BUG #6849] Add build-core jobs.
[BUG #6849] Added first draft of build.extras job.
[BUG #6849] Added loader template for the qx.Websites extras.
[BUG #6849] Added min job for the extras.
[BUG #7013] honor the 'exclude' spec also when calculating parts

- the parts 'include' specs are expanded when calculating their class list
- but the global 'exclude' was not honored
- now calculating a fully expanded exclude (block) list upfront, in
  script.excludes
- this is then used when calculating the initial deps of a part
- (the issue was that Part.initial_deps is used in the 'statics' optimization
  to calculate the reachability graph; if initial_deps contained a class
  that was not in the app class list, a key error occurred)
list ignored packages in UI
simplified ignorePackages handling
support package ignore for sub-namespaces
[BUG #7015] Fixed stopping of js based animation which are delayed.
[BUG #7039] Provide a way to create application-specific themes in qx.Mobile 


* Updated description in application.less
[BUG #7047] Switch from LESS to SCSS/SASS 


* Transformed LESS files to SCSS files
[BUG #7048] qx.ui.mobile.page.manager - Hide Master Page 


* Provided Button Page Manager for hiding the MasterContainer in Landscape Mode.
[BUG #7048] qx.ui.mobile.page.manager - Hide Master Page 


* Provided the possibility to hide/show the hideMasterButton
removed 'experimental' note from Parts