remove unused colorize dependency
remove trailing spaces
minor style adaptations

We're already using 1.9 hash syntax, might as well go all the way.
Also aligning a bit.
correct Utils::get_timstamped_key_name typo
remove Utils::get_utc_timestamp indirection
remove Utils::get_timestamped_key_name indirection
remove unused Utils::ungzip_file
avoid 3 newlines for consistency

Sorry, turns out the slightest details can throw me off.
I have to stop procrastinating now.
database/*: remove indirections
introduce report path