Starter EditorConfig and jshint files

I like both of these tools

EditorConfig helps many people use the same indentation style and does some whitespace trimming.  

Static analysis (jshint) I almost consider a must these days, although there's on-boarding work (there will be lots of flags thrown up in the current source).

I'm not trying to put forward a particular style (tabs vs spaces for instance;  I actually usually use spaces).   I made a starting place from existing files I has with some changes to reflect what I see in the easeljs source.