Added a utilities file containing various useful functions.
In this initial version the dotProduct function was added.
Makefile changed to support multiple files
Added functionality of read a config file.
Error produced if file cannot be opened.
Warnings produced if variables exist in the config that aren't used in the programme.
Added comments for each section of the function
Re-added "arc-utilities.h" for makefile testing (shouldn't affect code in any way yet)