added global config
fixed bug pagingOptions.currentPage became a string when change page by input
Merge pull request #167 from bolasblack/fix-forward-page-bug

fixed bug pagingOptions.currentPage became a string when change page by input element
simplifying row entity update logic
making row generation a little more performant.
changing where afterSelectionChanged gets fired.
Merge branch 'master' of https://github.com/bolasblack/ng-grid

Conflicts:
	ng-grid-1.9.0.debug.int.js
Merge branch 'master' of https://github.com/angular-ui/ng-grid