[FIX] Advances in snp_store adaption to new I/O module.

GFF support works now.
Merge branch 'feature/stream/develop' of github.com:holtgrewe/seqan into feature/stream/develop

Conflicts:
	core/apps/snp_store/snp_store.cpp
	core/apps/snp_store/snp_store.h
[FIX,FEATURE] Adapting bs_tools to new stream module.

Also, remove all trailing whitespace in there.
[FIX] Less complexity in bs_tools/bisar
[FIX] Using getFileFormatExtension() in bs_tools.
[FIX] Forgot one getFileFormatExtensions() in bisar
Merge pull request #51 from holtgrewe/feature/stream/adapt-bs_tools

Adapting bs_tools to new stream module.