Improved logging, color carries information.

Instead of request logs cycling through colours, bits of log
information are assigned appropriate colours for easier scanning.
ie. GET methods are all blue, 200 status codes are all green.
Respecting useColor setting, corrected params output, tests fix.
Updated logger example.
Moved params above accept in logger output.
Removed older comments referring to log color cycling/grouping.
Merge pull request #283 from nikuda/master

Improved logging, color carries information.