[FIX, INTERNAL] Fixed issue with referencing return values of light-weight container types.

git-svn-id: http://svn.seqan.de/seqan/trunk@14525 e6417c60-b987-48fd-844e-b20f0fcc1017
[FEATURE,INTERNAL,FIX] Added rooted iterator for journaled sequences. Fixed decrement of unbalanced tree based journal strings.

git-svn-id: http://svn.seqan.de/seqan/trunk@14526 e6417c60-b987-48fd-844e-b20f0fcc1017
[FEATURE] Gustaf App: VCF output format, including adapted app tests

git-svn-id: http://svn.seqan.de/seqan/trunk@14527 e6417c60-b987-48fd-844e-b20f0fcc1017
[FIX] fix valgrind path

git-svn-id: http://svn.seqan.de/seqan/trunk@14528 e6417c60-b987-48fd-844e-b20f0fcc1017