Bumping version to 0.9.0

Bumping the version to 0.9.0 to release to PyPi. There's been 139 commits since the last release and a major UI update.

Author: bulam

knowledge_repo/_version.py

@@ -5,7 +5,7 @@
 
 __author__ = "Erik Ritter (maintainer), Serena Jiang, John Bodley, Bill Ulammandakh, Robert Chang, Dan Frank,  Chetan Sharma,  Matthew Wardrop"
 __author_email__ = "erik.ritter@airbnb.com, serena.jiang@airbnb.com, john.bodley@airbnb.com, bill.ulammandakh@airbnb.com, robert.chang@airbnb.com, dan.frank@airbnb.com, chetan.sharma@airbnb.com, mpwardrop@gmail.com"
-__version__ = "0.8.10"
+__version__ = "0.9.0"
 try:
     with open(os.devnull, 'w') as devnull:
         __version__ += '_' + subprocess.check_output(['git', 'rev-parse', 'HEAD'], shell=False, stderr=devnull).decode('utf-8').replace('\n', '')