don't concatenate strings in the logger
added cache for guice keys
don't scan primitves
added javadoc & license
fixed license
Added checking if LOG level is enabled
Additional checking of String type
reverting double-checking of LOG level
changed order of checks in the accepts method
Merge branch 'SLICE-54' of github.com:Cognifide/Slice into SLICE-54
changing order in SliceReferenceFieldProcessor.java
small fix for logging
Merge pull request #29 from Cognifide/SLICE-54

Slice 54