Automatic image resizing

Added ability for the application to automatically resize images when
they are uploaded. This functionality utilizes the "intervention/image"
package.
Edited config variables for consistency

Edited variables that were added to the wardrobe config file for
consistency. Also, disabled resizing by default.
Merge branch 'master' of git://github.com/bradstinson/core into bradstinson-master
Merge branch 'bradstinson-master' into v1.1.0

Conflicts:
	src/config/wardrobe.php