improved source_select calling convention
 updated arc.coffee to use new vectorized ops
refactoring to a common initialization
 simplified set_data
WIP on render refactor
 working selection for rect and circle
 working arc glyph
 annulus now works, witha  demo
 asterisk doesn't work,  size isn't defined for some reason,  will look into it later
 asterisk now works
 annular wedge now works
 annular wedge now works
 beziers now work
 beziers now work