add keyword args
fixes for kwargs
change tk_* to just *; get_width, get_height to width, height
change tk_* to just *; get_width, get_height to width, height
clarify width,height
fix up width/height
Merge branch 'master' into kwargs

Conflicts:
	src/tkwidget.jl

Fix initialization (combine master with kwargs)
Merge pull request #27 from JuliaLang/kwargs

merge Kwargs branch