Layers can be negative on all targets (getting rid of HXP.BASELAYER)
Merge pull request #189 from azrafe7/feature/layers

Layers can be negative on all targets (getting rid of HXP.BASELAYER)
Implementing BitmapText word wrap. Also various fixes to BitmapText on Flash: fixing color/alpha and scaling bugs, and improving render performance, especially when text is gradually added to.