Fixing release notes for upcoming 0.9.13 release
Adding latest commit to release notes
Merge pull request #1051 from deniszh/master_0.9.13_releasenotes

Fixing release notes for upcoming 0.9.13 release
Adding pytz test for check_dependencies.py

Fixing issue #1019
Adding pytz as dependency into install documentation
Merge pull request #1062 from deniszh/master_pytz

Master pytz
Adding #1026 to 0.9.13 release notes (master branch)
Merge pull request #1065 from deniszh/master_releasenotes2

Adding #1026 to 0.9.13 release notes (master branch)
Update 0_9_13.rst

Removing "UNDER DEVELOPMENT", adding "No known security issues" as @obfuscurity suggests in https://github.com/graphite-project/graphite-web/issues/677#issuecomment-67869602
Merge pull request #1068 from deniszh/master_releasenotess

Update 0_9_13.rst
Merge pull request #63 from graphite-project/master

Pull in Upstream Changes