Polished sources related to kmer iteration for regular alphabets
Merge branch 'master' of https://github.com/genometools/genometools
Merge branch 'master' of https://github.com/genometools/genometools
Rename identifiers related to special queue.
Renamed Specialitem to GtSpecialcontext.
Use pointers into queue rather than indices.
Remove unnecesary code which complicated computation.
Merge pull request #81 from stefan-kurtz/sk

Sk