fixing signedness warnings
responding to the xcode 5 changes
fixing some static analysis issues
cleaning up default log formatter
no longer loading cocoalumberjack extensions
Merge branch 'riseup-branch'

Conflicts:
	Lumberjack/DDAbstractDatabaseLogger.m
	Lumberjack/DDFileLogger.m
	Lumberjack/DDLog.m
	Lumberjack/DDTTYLogger.m
	Lumberjack/LJS/LjsDefaultLogFormatter.h
	Lumberjack/LJS/LjsDefaultLogFormatter.m