* Sessions in MySQL
* Reclaiming some names
* session renewal without new cookies on every request
* comments and docstrings
* light organization in vc generation
* go vet
* endpoints for session management
* Merging @zwass' commit with mine
* Updating salt generation to use crypt/rand
* use getRandomText for session keys
* VC no longer needs a DB or to return an error
* getRandomText docstring
* Only use session via the SessionBackend API
* Set session backend with the request, similar to db
* Eliminate global DB connections. Instead, one connection is established (with the underlying object supporting pooling) and passed through the gin.Context. This allows test/prod to inject the appropriate DB object into the context.
* Refactor tests appropriately for this new style of DB connection
* Fix a bug in the routing caught by refactoring of tests
* Add request logging.
* Catch/log panic in request handlers.
* Add `mustGetDB` method that gets a DB connection or panics. This can simplify
boilerplate in handlers.
* Consolidate `file` and `line` in logged fields to `location`.
* Set default log level to `WarnLevel`.
* Log a warning when Kolide is started with the example config.
* Turn on DB logging in debug mode.
Example output:
```bash
$ kolide-ose serve
=> kolide 0.1.0 application starting on https://:8080
=> Run `kolide help serve` for more startup options
Use Ctrl-C to stop
time="2016-08-02T14:25:02-07:00" level=info msg="some info logs!"
file=proc.go func=runtime.main line=188
time="2016-08-02T14:25:02-07:00" level=error msg="some error logs :("
file=proc.go func=runtime.main line=188
```
close#26
