Added support for adding vehicles from a mission.sqf

- Added support for adding vehicles from a mission.sqf
- Replaced VIP Edit accesslvl permission with "Can add vehicle by sqf"

This is just a little handy addition so that you can use the Arma 2 OA
editor to add vehicles to your DayZ server using this
Added a divider
Folder structure
Removed quotes from numbers, using config for instance id
Added ability to choose chance
Added check to see if $chance is a numeric value
Small edit
Fixes(Thanks Wriley)

- Case fixes(Stupid windows making my tables lowercase)
- Multiple checks to see if query worked or directory is writeable
A few changes and fixes
Merge pull request #206 from Marcuzz/master

Added support for adding vehicles from a mission.sqf