Add toString Method
Add default values Comment
Merge remote-tracking branch 'upstream/master'
Change creation date from Entity to Model
Merge pull request #38 from Takeatea/master

[WIP] Store possible values as applicative constants
Merge pull request #35 from antwebes/master

Comment default values
#39 issue : documentation : avoid problem with some Wordpress plugin
Merge pull request #40 from Draeli/master

#39 issue : documentation : avoid problem with some Wordpress plugin
Merge remote-tracking branch 'upstream/master'