file upload for loadJSON()
Added 'Legende'
r4-1-load-JSON prepared to be finished
Merge branch 'r4-1-upload-json' into develop

Conflicts:
	app/index.html
update index.html after merge conflicts
Preparation for Date-PropertyType

Added controller, directive, config-entry and template.
No translation functionality yet.
Load subjects from JSON

The load JSON-function works now for subjects without properties. I'm
working on the properties.
Additional the reset workspace function has been improved (did not clear
all subjects from workspace).
Load properties from JSON

Adds the properties of the subjects before subjects are "pushed into
workspace". Needed little correcture in translation.
 resolved style issue of the top-controls
Link Subject with startpoint on loading JSON

Finds the subject connected to the startpoint and adds the connection in
the startpoint-box.
Comments and iteration over properties

iteration over properties is preparation for adding linkPartners to the
loaded subjects.
some tab deleting and code style changes
Alias of startpoint link now gets underscored

A main subject with an empty space in its alias was not properly
translated as that alias did not get an underscore in the STARTPOINT
part of the json. Now fixed.
Fixed problem with underscores in aggregate props

There was a problem with replacing blanks with underscores for agregate
properties. should work as intended now.
Added function to replace duplicate prop aliases

There was a problem when properties with the same alias were translated.
Added a function that replaces duplicates with added number. Might be a
better solution for this, but works for now
Fixed translation of comparisons #47
added service test (for translatorToSPARQL)
Added date comparison.
Changed testing browser to FF.
Alles jefiggst.