Merge pull request #15 from marshluca/master

Remove migrations
add page cell engine for refinery cms
Merge branch 'develop', remote-tracking branch 'upstream/develop' into develop
fix white space bug in page cell
Merge pull request #16 from xueshibing/develop

add page cell engine for refinery cms
Merge pull request #17 from xueshibing/develop

fix white space bug in page cell
add cells to page_cell
fix Gemfile.lock
remove some unused code
Merge pull request #20 from xueshibing/develop

integrate cells to page_cell
spec/dummy
Merge branch 'develop'