* add colors.yaml file and switch any color reference to use it in
`lib/colors/core.rb`
* add light and dark verions of the commands, also moved load_from_yaml
* fix typo
* add colors for new commands from the merge
* fix name and update colors for the light and dark scheme
* fixed small typo when no files are found
* Add entry to files.yaml to handle .log file
* Update files.yaml, correcting a typo in log entry
* Update on core.rb, to check if the directory is empty
* Update on core.rb, rewrote test, because Travis saw it as an offense
* Update on core.rb, typo in my test
* Update core.rb, switch error message on empty folder
