Removed Bolonha 1st cycle degrees from incoming mobility programmes options.
Added support for modifying a student's mobility programme.
Modified criation of incoming mobility vacancies to allow the creation of multiple vacancies at the same time
Added support for modifying a student's chosen degree.
Closes #522
Closes #525: Modified exported xls file to include username and separate each field in a different cell
Removed commented code on line 407
Fixed bug related to adding images to an announcement
Fixed forward from module webSiteManager to messaging for channel management
Updated to Bennu Renderers 4.1.0

  * Removed deprecated JSTL dependency
Bug fix: fixed incomplete removal of has method
Minor change: corrected the logic, it should test == null to reflect the
previous behavior
New feature: recovered deleted feature that is still needed
New feature: recovered deleted feature that is still needed (added
missing file to previous commit)
Bumped version for release of 3.6.1
Merge branch 'release/3.6.1' into develop
Bumped version for development after release.
Minor change: removed the hiffen character
Bug fix: implemented missing override method, necessary to generate link
to thesis site
Bug fix: fixed the right if case
Bug fix: recovered correctly this deleted jsp that is still necessary
Bumped version for release of 3.6.2
Merge branch 'release/3.6.2' into develop
Bumped version for development after release.