[DOC] Manual: updated the VcfIO tutorial
[DOC] Manual: small fixes to the BamIO tutorial
[DOC] Manual: disabled custom I/O tutorial
[DOC] Manual: updated indexed fasta I/O tutorial
[DOC] Fai: dox updated
[DOC] Manual: updated the VcfIO, BedIO, GffIO tutorial
[DOC] Manual: updated the FragmentStore tutorial
[FIX] Manual: fixed the VcfIO demo
Merge pull request #760 from esiragusa/feature/manual/io

Updated I/O Tutorials