-Layouts no longer implement Sizeable (except SplitPanel and ExpandLayout). Sizeable...

-Layouts no longer implement Sizeable (except SplitPanel and ExpandLayout). Sizeable implementation now copy-pasted to all implementing classes (Panel, Tabsheet, SplitPanel...).
-Changed ReservationApplication to conform to new setStyleName. Removed deprecated style constant usages also. Some margins enabled to layouts.
-IOrderedLayout vertical reverted back to DIV implementation.
-Margins added to demo layouts where needed.

svn changeset:2714/svn branch:trunk