Merge pull request #14 from xueshibing/develop

support erb syntax and set first user as spree administrator
remove db/migrates/
update installation in README
Merge branch 'feature/remove-migrations' into develop
fixed a typo
add a missed step in README
Merge pull request #15 from marshluca/master

Remove migrations
add page cell engine for refinery cms
Merge pull request #16 from xueshibing/develop

add page cell engine for refinery cms
Merge branch 'develop', remote-tracking branch 'upstream/develop' into develop
fix white space bug in page cell
add cells to page_cell
fix Gemfile.lock
remove some unused code
parse arguments for page_cell