Make MPlacement.__place a protected method.

This gives subclasses access to a "place to rect" type of functionality.
[BUG #7735] remove storage component
Merge pull request #68 from aspectit/xxxx-place-to-rect

Make MPlacement.__place a protected method.
[BUG #7776] Added unique method to the collection.
[BUG #7777] Fixed return types for data sets.
[BUG #7779] minor corrections
[BUG #7782] ignore translateZ if 3D transforms aren't supported
[BUG #7784] qx.Mobile Menu should be able to forget previous selection
[BUG #7786] Fixed RegEx for os.version to detect iOS 7.0.2
[BUG #7777] Fixed return type for browsers without dataset support
Merge branch 'master' into resolution