Update script as per syntax verification

- Double quote variables to prevent globbing
- Remove unnecessary echo statements as command expansion makes it unnecessary
- Remove unnecessary command expansion for if statements

Issue: #36
Update $PROGDIR variable to hardcoded value

Hardcoding the variable for the $PROGDIR variable for now as anything I use to
get the script path either via readlink, or greadlink, or pwd or combinations of
anything I've found on StackOverflow.

Issue: #37
Update bash_aliases bug

Double quote the alias around the ViM update alias as it was breaking every time
terminal loaded.

Issue: #38