Mmpm

- Code cleanup. Split up files more appropriately
- Enhancment. Split up functionality of command line options into groups
- Enhancment. Added options for user to control MagicMirror from CLI (similar to GUI)
- Enhancment. Added ability for user to add new external module title, author, repo, and description
from CLI without prompt required
- Enhancment. Added ability for user to open the MMPM GUI from terminal, and display the URL
- Enhancement. Added ability for user to view log files from CLI

- Bug fix (no number). Fixed issue with update command, where git commands place stdout in stderr
position

- Enhancment (26). Added command line option to display the MMPM web interface URL
- Enhancment (27). Added command line option to display the currently enabled modules
- Bug fix (29). Corrected log.info to log.logger.info in utils.py within the
kill_magicmirror_processes function

- Bug fix (23). Added `electron` to the list of processes to kill when stopping MagicMirror, and
updated util functions to use pm2 for MagicMirror controls

- Bug fix. Added module name santizing, fixing installation issues with module names with slashes (contributor: herostrat)
- Bug fix. Confusing messaging when multiple modules are installed, making it unclear which modules
failed to install properly

- Bug fix. Changed method of loading requirements from requirements.txt within setup.py