Commandalarm

Changed
- Updated the description for the --no-check option.

Removed
- Removed the minimum number of seconds being set to 1 in the set_alarm function.
- Removed int and round calls in the set_alarm function.

Changed
- Changed to only use threading.Timer.
- Checking parameters in the function set_alarm.
- Updated the description for the option day.
- Updated the description for the option repeat.

Changed
- Split the command argument into two (command and argument).
- Specified the program name in argparse.ArgumentParser.

Removed
- Removed call to signal.alarm on KeyboardInterrupt.

Changed
- Changed so that the program can work in Windows that lacks SIGALRM (untested).
- The program exits with an appropriate error code depending on the error.
- Interpreting command-line arguments in own function.
- Strip whitespace from the output of the command run.
- Updated description for option shell.

Removed
- Removed encoding declarations.
- Removed the function validate_weekday as it was not needed.

Added
- Option shell.
- Option no-check.
- Option timeout.

Changed
- Error messages are printed to stderr.
- Exit with error code 1 when the user aborts with Ctrl-C.
- Updated the code to be PEP8 compliant.

Initial release