Added backend to manually divide debt between group members
add validation to add group,
move group members
Api description update
Add tests for registration
Send email after successful registration
Add test for resetting password
Make sure group model has group key in representation
Merge pull request #4 from pbzymek/master

Divide debt manually between group members
Merge branch 'gibu_master'
Add handling errors in api group create/update
Bring back group summary to left
Add yard for doc
Rename "persons" to "people"
Force tmp dir
Allow sandbox env
Ignore rbenv's .ruby-version
Latest rails gems
Update bootstrap related gems