v0.9 better logs + cleanup

• better logs (related to #18 (closed) and #19 (closed))
• new option: --debug, which activates logs regarding internal operations
• --verbose does not imply --debug, --debug does not imply --verbose
• --verbose mainly outputs information about what's being stored into the DB (and such information is prefixed by > ) and other information is prefixed by # (or not yet prefixed)
• remove all Obj.magic
• improve Makefile