Added additional project define flags

Example:

 nme test windows --haxedef=my_define
 nme test windows --haxeflag="-xml output.xml"
 nme test windows --haxelib="actuate:1.00"
 nme test windows --source=../shared
 nme test windows --template-path=../templates

The first is a little redundant (can already do -Dmy_define) but it made sense for consistency