Analysis plugin support

[loz]

There should be a way for task gems to register analytics data into some adapter. There should be a null adapter, and flags to run with a chosen adapter (local builds would use null by default).

Then we could write, for example, an elastic search adapter which can put the task analysis into elastic search for something to produce nice trend reports.

We really just need to basic framework in place for the stable 1.0 release, that way the adapters can be written and improved later..