pythainlp 1.5.2

- fix stopwords

pythainlp 1.5.1

fix bug in thai soundex

Merge pull request PyThaiNLP#46 from wannaphongcom/dev

PyThaiNLP 1.5

add rule in pythainlp.util.normalize

fix pip install https://github.com/franziz/artagger/archive/master.zip

add whitespace+newline in pythainlp.tokenize.sent_tokenize

add thai docs pythainlp 1.5

Merge pull request PyThaiNLP#32 from c4n/master

Proofread: แก้ภาษานิดหน่อยครับ

Update README.rst

add TCC References