improved -main error reporting (fixed issue #1538)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6333 f16182fa-f095-11de-8f43-4547254af6c6
added optional value argument to haxe.macro.Compiler.define

git-svn-id: http://haxe.googlecode.com/svn/trunk@6334 f16182fa-f095-11de-8f43-4547254af6c6
added Lambda specification

git-svn-id: http://haxe.googlecode.com/svn/trunk@6335 f16182fa-f095-11de-8f43-4547254af6c6
@:from functions may want to access the type parameters as well

git-svn-id: http://haxe.googlecode.com/svn/trunk@6336 f16182fa-f095-11de-8f43-4547254af6c6