Start in background and write to log file
Trim all values in structr.conf
Fixed bug in Importer which caused all head elements to be found in body.
It's a workaround for a bug in Jsoup which is fixed in 1.8.1 (see https://github.com/jhy/jsoup/issues/348)
Added check for undefined
Merge branch 'develop' of github.com:structr/structr into develop