[FEATURE] Gustaf: added small app for mate joining for Gustaf pe mode
[FEATURE] Gustaf: added full version of mate joining app and simple app tests
[FEATURE] Gustaf: added full version of mate joining app and simple app tests
[TEST] Gustaf: added more app tests for gustaf_mate_joining
[FIX] Gustaf_join_mates: segmentation fault when -o option not set
Merge branch 'develop' of https://github.com/seqan/seqan into feature/gustaf_join_mates_app
[FIX] Gustaf: adapted app test files after update from upstream
[FIX] Gustaf_sv_classifcation: first merge attempt