Use gridxCell:hover instead of gridxHeaderCellOver
fix modify not compatible with filter
merge
merge edit.js's whitespace issue
Merge branch 'master' of https://github.com/oria/gridx

Conflicts:
	modules/Edit.js
Fix AdaptiveFilter + NestedSort incompatibility
Add HeaderRegion module, rewrite NestedSort
Use HeaderRegions to implement HeaderMenu
Remove old files
Add API doc for header menu and header regions
fix typo
Move adaptfilter menus to gridx/support/menu
Adjust single sort arrow position
Use td for header instead of th to avoid rpt violation
Add api doc to menus
update unselectable row
Merge branch 'master' of https://github.com/oria/gridx
Fix header
Add keyboard support to PagedBody
update unselectable row