Loads the sort setting from  to pass to the lister
Adds a sort algorithm
This algorithm sorts files by either created or modified time. If no sort definition is created, we skip the sorting.
Adding references to the sort options to the documentation
Manually fixing merge conflicts
Changing isset() to strlen
Removing creation date sort as its not supported on many OS
Preserving the array index value order
Merge pull request #6 from ngallagher87/master

File sorting by date