Fix for #645 horizontal scrolling

This fixes the case when the horizontal scroll bar will not allow you to scroll to see the last column when using fixed columns.
remove waitsFor(nextFrame) from tests
bigfix: paste not working on Chrome on OSX
merge Object.observe shim fixes from https://github.com/Starcounter-Jack/JSON-Patch/pull/6
bugfix: initial render was incomplete with Native Scrollbars on
mention dgrid in alternatives
bugfix: not all rows were rendered when table had rows of variable height
comment out unused code
bugfix: 'flat notation' for renderers did not working
Merge branch 'master' of git://github.com/bgrohman/jquery-handsontable into scrollFix
make Callbacks demo faster and more convenient
bugfix: scrolling to the last row/column did not work with rows of big height, or columns of big width
Merge branch 'bug#713' into 0.9.3
bugfix: flat notation of options `cellProperties.renderer`, `cellProperties.editor` did not work as desired (#713)
Merge branch 'scrollFix' into 0.9.3
remove duplicate desc
Merge branch 'sync_test' into 0.9.3
change async tests to sync where possible
Merge branch 'chromePasteBug' into 0.9.3
cut and paste events did not work in a reliable way in Mac Chrome and Safari