Reworking the NeuroML export.
Needed to export in micrometers rather than nanometers,
and to export a list of skeletons each as a NeuroML Cell.
Synapses are still not defined, and there is no entry in urls.py
or access from the web client yet.
Merge branch 'master' into neuroml
More fixes for NeuroML export. Exports the XML but correctness has not been validated yet.
Fixes for exportneuroml.py

The Segment vs SegmentParent objects in NeuroML python are not entirely clear to me.
Merge branch 'master' into neuroml
webglapp: create the submitter only on init(), not when loading the file.
The issue being, asynchronous loading of the file may result in the submitterFn
not existing when invoked.
overlay.js: the submitterFn belongs to the SVGOverlay,
and so do some of the functions that had been assigned
to the SkeletonAnnotations. This includes the registering
of the SVGOverlay instance for use from so-called static
functions.

Additionally, refactored SVGOverlay to follow a style where each function
is declared independently of the others. Less indendation and clearer
reading of the object a function belongs to.
Fix error in overlay.js, improper function declaration.
webglapp: properly remove special tag spheres when removing an actor from the scene.
webglapp: create spheres for low-confidence edges.
Remove unused variable.
Data views: add method to retrieve data view type
Retrieve data view type if not passed on data view switch

This change allows to switch to a data view without knowing its type in
advance. The switch method will retrieve it if the type is not passed
in.
Allow data view specification in URL

This commit adds support for URLs like "<catmaid-url>/?dataview=<id>"
where <id> is the primary key for a data view. For now, this works for
all data view types except legacay views. This refers to issue #542.
Add data view links to data view menu

With the help of these links, one can link directly to a data view.
The link symbol is only visible when hovering the menu item. This commit
refers to issue #542.
Merge branch 'dataview-links'
Fix documentation of _skeleton_for_3d_viewer
scripts/remove/access.py: enable basic authentication and update skeleton_graph function.
Merge branch 'master' of github.com:acardona/CATMAID
Classification edtior: allow renaming of root node