* Update and rename README to README.md and Unicode strings
Updated Readme file and converted from rst to markdown.
String contains ascii characters (converted to unicode string)
Signed-off-by: Mpho Mphego mpho112@gmail.com
* Deprecated import `from __future__ import unicode_literals` removed and ran isort module
https://mail.python.org/pipermail/python-dev/2016-December/147009.html
Included setuptool-git in the requirement.txt and updated `setup.py`
Reasons for this are highlighted here -> https://github.com/msabramo/setuptools-git#usage
* Allow both both hoidays and append holidays; match holidays in predict and fit
* Allow both both hoidays and append holidays; match holidays in predict and fit
* Add test for append_holiday features; minor fixes
* Add column name validation for append_holidays names; allow only one country
