#134 List Occurrence

1. Added List Occurrence to the Menu
2. Added ListOccurrenceController
3. Added Views to list all occurrences and show the datail of one occurrence
4. Change the maven-resources-plugin from version 2.3 to 2.4, it solves the problem acessing the internationalization on the .properties
5. Correction on Occurence field, dateOfOppening to dateOfOpening
6. Added changelog to correct the field in the database table