Add function to get user config file
Util: read_file_json
Read setting when startup @ main
Read session placeholder when startup @ main
Add a singleton to handle session
Helpers [] for Session
Rename: default_settings -> default_params
Remove the renamed default_settings
Move some info to session from settings
Add merge method to session
Read session
Remove @settings from App since it's not needed anymore
Correct: taking :default_contents_path from Session, not Settings
Correct info taking Session, not Settings
Correct info from Session, not Settings
Add Session.to_s
Text Edit now gets settings in a Hash-like way
Setting is now a subclass of Hash
Session is now a subclass of Hash
Correct the way Settings & Session should be read @ main