add requirements.txt
add .gitignore
add python package
add structure of mood
add some requirements
add models
Merge pull request #1 from Nethell/dev

Dev
Define the model of users' account
Fix some errors in models/user.py
add exceptions | change some code style
Merge pull request #2 from Nethell/dev

Dev
New validator of document 'User' && Define the model of comments
Merge pull request #3 from Nethell/dev

New validator of document 'User' && Define the model of comments
Set required fields of document && Modify style to pass pylint
Merge branch 'dev'
Define the model of 'story'
remove code comment because it's obvious
Merge branch 'master' of https://github.com/Nethell/mood

Conflicts:
	mood/models/user.py
change some params
change comments structure