Added the Relative Date (reldate) module.
Fixed deleting files & folders within sites/default/files when they are write protected (added some sudo powers).
Added an extra script to reset the environment (reinstall without updating core & modules).
Created the basic install profile.
Refactored the reset script: moved reusable code to helper functions.
Refactored the update script: moved reusable code to the helper file, reused already defined code.
Refactored the install script: moved reusable code to the helper file, reused already defined code.
Fixed the scripts so they can be run from within any location.