Fixed the group issue with mysql 5.1
using quote column to protect reserved word column names
using quote column to protect reserved word column names

Conflicts:

	classes/model/minion/migration.php
Added check for the existence of the service table, and it was created
at the request status
Config changes
Merge branch '3.2/develop' of https://github.com/kohana-minion/tasks-migrations into HEAD
Merging Xobb/3.2/develop
Merge remote branch 'kimberv/quote_columns' into 3.2/develop
Merge remote branch 'fedott/3.2/develop' into 3.2/develop
Merge remote branch 'jmktrains/3.2/develop' into 3.2/develop