Merge pull request #17 from WonderCsabo/master

Added mailer for works
Merge pull request #18 from WonderCsabo/master

Task partial, finishing devise_invitable
Merge pull request #20 from WonderCsabo/master

Resolving path collision, fixes #19
Added db config example
Nice footer for phones
Merge pull request #22 from helenalissenko/master

Nice footer for phones. Nice commit. Thx.
Work with two states: finished, in_progress