deleted get_end_of_input() and deleted the test for it
Deleted some unnecessary code in command_prompt.c and .h
Modified handle_INSERT function, make it work as a toggle
Updated comments for all .c and .h files
Merge branch 'master' of https://github.com/Raydivine/Calculator
Merge pull request #12 from darklord1310/master

Updated code in command_prompt.c