handle calls to abstract member from within abstract by passing "this" (fixed issue #1722)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6505 f16182fa-f095-11de-8f43-4547254af6c6
fixed warning

git-svn-id: http://haxe.googlecode.com/svn/trunk@6506 f16182fa-f095-11de-8f43-4547254af6c6
fixed issue #1637

git-svn-id: http://haxe.googlecode.com/svn/trunk@6507 f16182fa-f095-11de-8f43-4547254af6c6
recurse upon field-less abstract casts while detecting cast-calls (fixed issue #1695)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6508 f16182fa-f095-11de-8f43-4547254af6c6
timestamp unit tests

git-svn-id: http://haxe.googlecode.com/svn/trunk@6509 f16182fa-f095-11de-8f43-4547254af6c6
employ abstract cast stack (fixed issue #1757)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6510 f16182fa-f095-11de-8f43-4547254af6c6