fix some issue in playground
Merge branch 'master' of https://github.com/oria/gridx
fix playground sortable attr not working
Update doh tests
update playground add groupheader
Merge branch 'master' of https://github.com/oria/gridx
disable lazySave by default
fix image path issue

when user set package loation for gridx, the image path may be wrong
format js object config code format
Fix CellWidget and alwaysEditing initialization conflict
merge from master