v0.9.0 enhanced --log-level and --debug specification
- new feature: -d -d sets log level of itself and all lower level modules to debug
- new feature: --log-level value1 value2 where level1 sets log level for matrix-commander-rs
and second value sets log level of lower level modules - also just -d works better now (less info)
- fixed bug: where private access token was printed to debug log, now *** being printed to debug log
- fixed bug: return value should be correct now (0 for success, 1 for error)