Add Urho shader cache and tundra log file to ignore.
Implement --loglevel {debug,verbose|warn,warning|error|none,disabled}
Fix copypaste in --loglevel.
Framework init: Apply cmd line options prior to any printing. This make --loglevel and --quiet actually suppress all prints. Formated the startup prints a bit, put empty lines where it makes to have some separation to make the log/console easier to read and follow. Lets see if people like it.