Merge pull request #220 from nealcpeters/ui_sortable

Ui sortable
modified some todo list
Merge branch 'master' of https://github.com/nealcpeters/infobytes into ui_sortable
add communities dropdown appears only if tutorial creator
Merge branch 'master' of https://github.com/nealcpeters/infobytes into communities
Merge pull request #221 from nealcpeters/communities

Communities
Merge branch 'master' of https://github.com/nealcpeters/infobytes into ui_sortable
add gravatar
firx merge conflicts
Merge pull request #222 from nealcpeters/precompile

Precompile
delete community membership button only visible on hover
fixed merge conflict
Merge pull request #223 from nealcpeters/communities

Communities
Merge branch 'master' of https://github.com/nealcpeters/infobytes into ui_sortable
merging master