Faster logfetch

[ssalinas]

Bunch of changes to logfetch:

• Fixed formatting so we use 4 spaces indentation everywhere 😄
• made the logging a bit nicer
• got rid of some unused methods
• removed the entire unpack step in favor of using zcat to get the content of zipped files (972fda6), this will still work for files in the cache that are already unpacked, it checks the file ext. and uses either cat or zcat, piping it to grep if needed