updated for SDK 990

- added --ini switch to choose ini file for core settings
- added Name = setting for custom bot name
- added greetings system; uses the new console messages feature and allows users to toggle greetings and hide themselves from being greeted
- telegrams system now uses console messages; requires !read to read telegrams and announces on user entry
- code naming changes + cleanup
- fixed log level setting
- made usersettings sections lowercase, to avoid duplicating for users' name case changes
- added migration for above
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