column virtualization prototype.
attempting improvements to virtualization.
doing some code optimizations.
adding column building on resize

fixing bug when grouping while scrolled.
fixing aggregate display.
major changes to accomoodate column virt.
fixed #171 digest after rowDrop
adding and fixing lots of stuff.

adding heavyVirt mode for columns
adding custom input directive for the default edit template
adding support for #173
demorgan crap :(
changing sorting to use $parse.
Merge pull request #177 from bolasblack/fix-#171-enableRowReordering-broken

fix #171 enableRowReordering config broken
Merge branch 'master' of https://github.com/angular-ui/ng-grid into colvirt
Prefixed CSS input selectors with .ngGrid class.
Merge pull request #179 from JSRhapsody/master

CSS input selectors too broad.
Merge branch 'master' of https://github.com/angular-ui/ng-grid into colvirt
merge master, rebuild
Fixing selections
change tab became space
cell navigation works now.