Pyfaidx

- Faster `faidx -i nucleotide` code

- Support for resolving duplicate keys using `duplicate_action` argument to `Fasta`
- Support for BGZF (block gzip compressed) FASTA files (77) (Thanks terrycojones!)
- Support for numpy 32bit and 64bit integer comparisons (114)
- Better file locking and buffer flushing (110)

- support for numpy integer types (114)
- `key_function` now applies to indexing as well as sequence retrieval (111)
- preliminary support for BGZF compressed files (77) (Thanks terrycojones)

- `Fasta(mutable = True)` now performs synchronous writes (110)

- `Sequence.longname` is now `Sequence.long_name` to match `FastaRecord.long_name` (thanks michaelbarton)
- `Sequence.longname` now raises a `DeprecationWarning`, and will be eliminated in a future release.

Added `faidx -e` option.