Seg. Faults fixes (1)

Segmentation fault 11 fix:
-Function “readCommand” has a safety delimiter in the first [while] loop
Other fixes:
-Function “choice” is now a void
-Implemented quit, kill and process in “choice”
-Added integers (from and userID) required for some commands
-readCommand returns command and now only accepts 2 variables (what it
was doing before was somewhat overkill)
-In “readCommand”, I one-lined its contents
-newMessage ==> allocMessage
-removeNewLine breaks out of loop as soon as it finds the ‘\n’ character
-Edited comments
-(Very) small visual enhancements in the code