printers: Add ColorPrinter interface
PrinterTest: Test also ColorPrinter
Move LOG_LEVEL to output package
Printers: Refactor a bit
ColorPrinter: Add test
Add ConsolePrinter
Collector: Set up files and directory

Collectors should take on the task of collecting target files and
filters.
i18n: Update POT
i18n: Update german translation
Merge pull request #57 from sils1297/wip/lasse_do_not_touch

Wip/lasse do not touch