* feat: update log level command to show log levels
* test: add log level tests
* update TestCommands test
* docs: relation to GOLOG_LOG_LEVEL
* chore: update to latest go-log
* fix: do not output single subsystem name in CLI
* test: explicit subsystem request dont output subsystem
* LevelFromString renamed to Parse
* Modify `ipfs log level`
* Denote default level with sdubsystem name '(defult)'.
* make "*" an dalias for "all". Test to make sure both work the same.