Merge pull request #243 from nimiq/api

Help page and ending slashed fixed
bugfixes for the email importer
bugfixes to mbox importer
Merge branch 'api'
datadump update
updated selenium tests, final tweaks to multi tag filtering
improvements to mbox importing and tagging
fix for unclosed <a> tag
Merge branch 'master' of https://github.com/ialbert/biostar-central into travis-ci