Ignore Comments

Program will echo back input, minus comments.
Test Compilation Fix

Added lines to make use of parameters in execute-command.c to allow
hopefully allow test compilation.
Ignore Comment Fix 01

Fixed several errors found trying to test ignoring comments.
Ignore Comment Fix 02

More fixes.
Ignore Comment Fix 03

More fixes.
Ignore Comment Fix 04

More fixes.
Ignore Comment Final

Comment ignoring now working properly. Merging to Master.