Revert "Revert "initial commit for realtime ws stuff""

This reverts commit fd419a13bf247fa3e3cdaecddbcc060aa69b137c.
Revert "Revert "more work on realtime WS stuff""

This reverts commit dacc1773f35eed5c2059f8fe48706ee4d64f9bc8.
Revert "removed realtime stuff"

This reverts commit c2266ee64d9156016023b0ab5827fa52658c9eed.
Revert "remove travis ES stuff"

This reverts commit d995e82976d1ea97dc21469a323a92ee8d030367.
remove realtime stuff. all in gem now
show warning if the ES message mapping is invalid

fixes #WEBINTERFACE-223
(cherry picked from commit c03d1d5af76212910777e54d00fdb3ff5e48ca94)

Conflicts:

	public/stylesheets/core.css
prototype for quickfilter date histogram

relates #WEBINTERFACE-231
first working version of quickfilter histograms

still a bit messy, but working in a simple version. relates #WEBINTERFACE-231
Additional columns for the overview page.
production environment was not meant to be set to debug log level
Fixed addition of empty columns in stream settings.
Fixed a problem with unescaped text
Fixed unescaped text when a column is deleted.
Fixed a problem when unescaped text when a column is added or deleted.
Merge pull request #57 from edmundoa/fix-stream-settings

Fixed addition of empty columns in stream settings.
Merge pull request #56 from edmundoa/add-columns

Additional columns for the overview page.
no need to respect utc offset
finished quickfilter histograms

fixes #WEBINTERFACE-231
wrong standard selector for qg interval
Fixed 500 page help link #WEBINTERFACE-233