Sprintf fix for haxe 3

Force var-arg variants of sprintf to type created array as Array<Dynamic>
Fixes polygonal#10
Sprintf unused variable fixes

Remove unused variables in Sprintf, to stop compiler warnings
Haxe 3 - IntHash/Hash to IntMap/StringMap

Use new Haxe 3 Map datastructure
Haxe 3 - Update Limits for Haxe3+neko2

Removed conditional logic from Limits, all targets now share
integer limits

Use new Haxe 3 Map datastructure
Fix ParkMiller31
Haxe 3 - Remove Int32 from Sprintf
Merge pull request #11 from Dr-Emann/fix_sprintf

Fix Issue #10
Merge pull request #12 from Dr-Emann/haxe3

Haxe 3 changes