add haxe.ds.Either
CHANGES.txt update
add haxe.EitherType (see HaxeFoundation/hxnodejs#15)
[python] fix EReg.matchSub (closes #3458)
[cs] add coreapi and final modifiers to EReg
[python] remove documentation from Math because the XML merger does not like it (see #3381)
remove void return
fix some bugs in XmlParser (see #3381)
bugfix for air ios packager with enums : __constructs__ was not accessible in some cases because the slots were not declared in order
Merge pull request #3465 from nadako/eithertype

add haxe.EitherType (see HaxeFoundation/hxnodejs#15)
add haxe.DynamicAccess (see HaxeFoundation/hxnodejs#14)