Repaired a few errors in documentation

A few minor documentation fixes relating to configuration of the new hooks and working with ZIP files.  All ZIP files downloaded from Git now have a sub-directory.  Using zipball (as per the original docs) is difficult to work with because the sub-directory in the ZIP file is harder to predict.  But using the archive ZIP version doesn't suffer this problem.

e.g.

https://github.com/iElectric/mr.bob/zipball/master: Has everything under the directory **iElectric-mr.bob-15d4ee0**
https://github.com/iElectric/mr.bob/archive/master.zip: Has everything under the directory **mr.bob-master**

Cheers
Fotis