Bump version to 0.9.0

Merge pull request #85 from indralab/hgnc_synonyms

Add HGNC alias names as synonyms

Merge pull request #83 from indralab/optim

Optimizations

Merge pull request #76 from indralab/unidecode

Implement normalization for unicode characters

Bump version to 0.6.1

Update README

Bump version to 0.5.3

Merge pull request #46 from indralab/greek

Add support for spelling out Greek letters

Merge pull request #33 from indralab/update

Adapt to changes in INDRA resources

Merge pull request #27 from indralab/aa_synonyms

Remove AA synonyms