Bump haxelib version number
Change .length to Lambda.count()
Changed @:macro metadata to `macro` accessor (haxe3)
Change to use Map instead of Hash.  Slight change to metadata reading...
Use '_' for unused variables in switch statements (haxe3)
Fix for haxe3 (filter() now returns an array when used on arrays)
Change callback() to bind()  (haxe3 compatibility)
Bumped version number