[INTERNAL] Build System: renamed extras tests as seqan_test_xxx
[API] BamIO: renamed nameStore(Cache) as contigNames(Cache) and sequenceLengths as contigLengths
[INTERNAL] Store: updated references to nameStore(Cache) and sequenceLengths
[INTERNAL] Store: updated references to nameStore(Cache) and sequenceLengths
[DOC] Manual: small fixes to BamIO tutorial
[FIX] Build System: removed a debug message from FindSeqAn.cmake
[DOC] BamIO: documented contigLengths()
[API,DOC,TEST] BamIO: introduced getContigName() and getContigLength() to get reference sequence name and length from BamAlignmentRecord and BamFile
[DOC] Manual: explained getContigName() and getContigLength() in the BamIO tutorial
Merge pull request #756 from esiragusa/feature/bam_io/contig_names

Renamed BAM I/O contig names, cache, lengths