Display a warning message when a user is not on the latest version of a module

Contain the following commit to be able to display a warning message when a user is not on the latest version of a module:
* Added the last version number in the Module.
* Added a field named isLatestVersion in the Module.

See the related push request in the SlipStreamServer repository:  https://github.com/slipstream/SlipStreamUI/pull/128

This pull request fix https://github.com/slipstream/SlipStreamUI/issues/30

This is the result:
![islatestversion](https://cloud.githubusercontent.com/assets/2462866/2641324/32291250-bef8-11e3-99b9-c1b03341e0c2.png)