MT updates

rCRS N removal now optional; loop allowed on rCRS/RSRS & synonyms.

Python 3 support

SeqSeek now support Python 2.7+ and Python 3.4+

Convert to rCRS mitochondria, load by accession, circular mito support

The SeqSeek 0.3.0 release adds documentation for undocumented features added in 0.2.x releases.

The main changes are:

• Chromosome MT now loads the rCRS mitochondrial sequence instead of the outdated RSRS sequence. See the readme for how the inserted N base is handled and removed.
• Support for loading by accession (e.g. Chromosome('NC_001807.4') if you want the outdated RSRS sequence
• Support for the circular nature of the mitochondria with the loop keyword argument (e.g. Chromosome('MT', loop=True))
• Newlines are now removed from FASTA files as a post-processing step of the seqseek downloader instead of in advance by seqseek maintainers.

Add support for build 38, restructure tests

• Added more support for build 38
• Restructured test suites
• Added command line test utilities
• Updated README.md