additional small fixes on service layer (security errors were thrown too
often)
tests fixed

getElements
getReactions
getOverlays

* login and rest token managament implemented
* getting of project info via rest added

popup window when clicking on a variant gene in geneome broswer added

submaps are opening from link (when accessing it from coment tab in
admin panel), however centering is still not handled properly

issue #46 solved

there are two type of overlay colors:
* user scope (every user account have custom color schema)
* system scope used when user colors are not defined

search for multiple drugs returned from time to time more results than
queried

connection