Add /lmgtfy and /lmbtfy commands

`/lmgtfy SignalR Documentation` becomes:
![lmstfyscreenshot](https://cloud.githubusercontent.com/assets/1687386/3526921/2f4c5274-0780-11e4-9298-44a41efc5f28.png)
In help, there are notes for /lmbtfy, but nothing for /lmgtfy:

![image](https://cloud.githubusercontent.com/assets/1271535/3564857/9f1365b6-0a9b-11e4-9418-7bb7c1771afc.png)