version 0.3.7

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- change stop word removal back (optimization)

version 0.3.6

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- added stopwords list and included downcasing to improve performance

version 0.3.5

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- Bug fix for text documents by Rio Akasaka

Version 0.3.4

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- Bug fix by Rio Akasaka, fixes issues with segfaults under Ruby 1.9.2

Version 0.3.1

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- top_words method now returns actual words if they exist in the vocabulary

Version 0.3.0

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- Completely broke backwards compatibility

- Reworked many classes to make functionality more reasonable

- Added ability to load documents from text files

Version 0.2.3

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- Bug fixes by Todd Foster

Version 0.2.2

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- First stable release