add grid plugin
fix demo's bug
fix a bug when newItem after a detail row
fix bug when newItem to some position
fix a bug when show empty info many time

fix a bug when newItem when have detail row
fix for #262
Merge pull request #237 from zongwei007/Grid

Add a grid plugin
Merge
bumped version and updated bower.json
updated version
corrected versions
Merge remote-tracking branch 'upstream/V2' into V2

Conflicts:
	js/footable.js