Craeting the Ocurrence

1. Add of Ocurrence entity
2. Add of OcurrenceBean
3. Add of OpenOcurrenceController
4. Add of form page ( not complete yet )
Open Occurrence form

1. Rename of the sources Occurrence written worng
2. Completion of the form for opening Occurrence
3. Validation of openning occurrence
Occurrence Changelog

1. Add Occurence changelog
2. Finish the creation of a new occurrence
3. Add the menu to the contextMenu
4. Add internationalization strings and messages
Refactor OpenOccurrenceController
Merge pull request #126 from efraimgentil/master

#121 Open Occurrence
Sorry for the delay
Merge remote-tracking branch 'upstream/master'
Updating VRaptor to RC2 to close #128