Bump version to 1.8.0 and upload to PyPI
Bump version to 1.8.0 and upload to PyPI

Major improvement is better tree building that leads to smaller trees and 2x faster search performance
Also added support for Python 3.5

subu-cliqz/annoy,spotify/annoy,pombredanne/annoy,spotify/annoy,tjrileywisc/annoy,spotify/annoy,subu-cliqz/annoy,eddelbuettel/annoy,subu-cliqz/annoy,spotify/annoy,tjrileywisc/annoy,tjrileywisc/annoy,tjrileywisc/annoy,eddelbuettel/annoy,eddelbuettel/annoy,pombredanne/annoy,eddelbuettel/annoy,pombredanne/annoy,subu-cliqz/annoy,pombredanne/annoy