Initial .hgignore
Initial .hgignore

We ignore *.pyc, vim swap files, build results under BUILD/ and Lexicon.pickle

This is handy, because otherwise, say after runtest.py run, 'hg status' shows
lots of unrelated info, thus lowering signal-to-noise ratio.

bhy/cython-haoyu,bhy/cython-haoyu,bhy/cython-haoyu,bhy/cython-haoyu