Pull out the "Analytics" tab into something generalizable.

[phildini]

The way tikibar handles analytics actions is one of the last things that needs to change before we can open source tikibar.

One way of doing this is to make a "plugins" framework, where users could register an analytics handler for tikibar that would "do the right thing"

The super simple version of this is make a settings flag that turns analytics actions on or off.