i18n: Fixing the dustjs template handler
logging: Adding method to Logger to get numeric log level
Cleaning up stacktrace_node. Using Array push method. Also, omitting "Stack trace" message because sometimes the error message does not represent a stack trace.
i18n: dictionary compiler improvements
i18n: Improving logging
Merge branch 'master' of https://github.com/raptorjs/raptorjs