map newlines to br tags and sort full_message last

introduce new default field mapper for full_message
use a sorted map for fields, sorting full_message last

fixes #262
link global throughput to system page. fixes #294
fiddle with the fiddleria (escape lucene syntax)

fixes #290
debug travis for selenium tests
further debug travis for config file creation
Merge git://github.com/Graylog2/graylog2-web-interface into develop