Adding interfaces

[lindareijnhoudt]

At our company we are looking at CERIF to exchange some CRIS metadata and at the CERIF-Tools to facilitate that. In our use of the code, we made some small changes that i wanted to share with you.

This pull request contains the following commits:

adding extra interfaces, so it is easier to use the model library externally:

• Add an ICerifClassEntity interface for all *_Class linked entities.
• Add an ICerifKeyword interface for all *Keyword multilingual entities.

some repairs on the database, so it can be read out of the box:

• Replace all 'HUMAN' cfTrans by 'h', so it will match the EnumType Translation
• Update the organisations sql so it will also return organisations without an Address

and some minor ide-specific changes:

• Delete Eclipse IDE specific files from git index.
• Update the java compile version to 1.7
• Retrieve the webapp version number from the parent project.