[Applications] Fix apply form layout.
[Core] Adds jquery plugin "pagination".

This jquery plugin is used to load paginatiable resultsets asynchronously via Ajax
requests.
[Jobs] Create new module
[Core] Adds some base classes to Core module for convinience.
[Jobs] Fixes and Improves interoperabiliy between Jobs module and the other modules.

* Adds some properties to job entity ("title"; "company")
* Integrates the new properties in Applications->apply
[Applications] Uses jquery pagination plugin (and some minor cleanups)