Fix gen_rst.py to use the correct encoding even on Python 2.
Merge pull request #1897 from mdboom/doc/encoding_gen_rst

Fix documentation build failure (unicode error in generate_example_rst)
Corrected a wrong numpy record name in documentation. adjusted_close in parse_yahoo_historical doesn't exist, the author mean aclose
Merge remote-tracking branch 'upstream/v1.2.x'

Conflicts:
	doc/conf.py