Changed from application to app and app_name
Changed from application to app and app_name

- Fixed implementation of check_version
- Changed install_* to cmd_install_* so it’s less confusing
- For any instance of application where it’s used as a string, it’s now
called app_name
- For any instance of application where it’s used as an object, it’s
now called app

cbednarski/ifs-python,cbednarski/ifs-python