update celery to latest versions
downgrade PyMySQL to 0.5, 0.6 has too many bugs
tweak circus settings
only require `node_modules` for `make js`
move JS in stat page to separate file
combine JS files on stat page into one and upgrade JS libraries
remove no longer needed `js_bottom` template slot
first cut at a CSP policy with some unsafe elements
avoid and disallow inline styles, refs #55
added heka-py and heka-py-raven integration
added dependency on raven 3.4.1 and heka-py-raven 0.7
dropped all instances of the standard python logger for ichnaea
added heka logging tests for search
* removed unnecessary mangling of the heka_client in the heka_tween_factory
* removed unnecessary function call indirection
Merge pull request #57 from crankycoder/features/heka-py

added heka-py and heka-py-raven integration - refs #13, #14
removed raven section from heka configuration until import error is resolved