Add high performance gunicorn based wsgi wrapper

Also add pymysql to requirements so fully evented mysql queries can
happen.
Merge pull request #121 from rackerlabs/gunicorn

Add high performance gunicorn based wsgi wrapper
Change pymysql requirement to <0.6.2 so that we can use it with Python 2.6

RM5425
Merge pull request #122 from jmeridth/pymysql_requirements

Change pymysql requirement to <0.6.2 so that we can use it with Python 2.6
Fix tests related to upstream changes

Upstream neutron change on database API:

Sync db code from oslo-incubator
Change-Id: I0e1d86878d3eb924b01e04dced0f90b4e57757d8
Merge pull request #124 from asadoughi/fix

Fix tests related to upstream changes
RM6180

Deadlock fix and off-by-one error.

Fixing unit tests. One-by-one. By one.

Unit tests fixed.

Removed super cool log messages.
Merge pull request #125 from roaet/RM6180

RM6180
.gitignore cleanup for PBR
Merge pull request #127 from asadoughi/fix_gitignore_pbr

.gitignore cleanup for PBR
Fix Gunicorn server config

* cfg.StringOpt -> cfg.StrOpt
* also reference the config options from the correct section
Merge pull request #129 from rackerlabs/gunicorn_fix

Fix Gunicorn server config