blachon authored Jun 09, 2015 and Alexis Brenon committed Jun 11, 2015

Created a class for storing recording session and implemented it
- new class under model package called MetadataSession
- updated ModeSelection, MetadataRecordingLig and RecordActivity:
  - save a session when filling the metadata
  - skip metadata filling activity is a session exists
  - clear a sessions from RecordActivityLig if necessary
  - modified the xml views and class files consequently
The task is ok for Recording mode, but remains TODO for other modes