Avoid fetching connectors with compact-json when not needed.
Neuron Navigator: less operations to fill in skeleton table in Active Neuron.
New function to fetch only the skeleton node IDs without having to use compact-json
that loads way more data. Optionally loads the reviewer ID at no extra cost.
Fix: remove obsolete import of skeletonlist module

Having this import still in, caused a missing module error.

Thanks to Felix von Zadow for this pointer.
Merge branch 'master' of github.com:acardona/CATMAID
Annotation search: fix navigator opening on annotation removal

If a user removes an annotation directly from within the search results, the
navigator shouldn't open. It should only open if one clicks the annotation, not
the remove button. This commit stops the click event from bubbling up when
clicking this button.
Neuron splitting/merging: remove extra confirmation after click on OK

There is no need to ask the user for confirmation if (s)he clicked on OK in the
split/merge dialog, because the dialog should be confirmation enough.
Graph plot: add new dimension "Cable length w/o principal branch (nm)"
Merge branch 'master' of github.com:acardona/CATMAID
Annotations: fix indentation
Annotations: WIP
Annotations: avoid two LEFT OUTER JOINs by two subqueries

The retrieval of the username of the user who used a particular
annotation most recently is now done with a combination of two
subqueries. Before Django's ORM surprisingly created two LEFT OUTER
JOINs for a reverse foreign key lookup.
Annotation navigator: move handler wiring into to table creation

The purpose of the function to create the neuron table is easier re-use. To make
it even easier to re-use the neuron list table, all required handlers for it to
work are now added there as well.
Annotation navigator: let home node create neuron list directly
Annotation navigator: simplify query for annotated entities

Instead of having multiple queries per entity, three queries are now used in
total. This speeds up requesting entities considerably.
Navigator: properly list the first 25 neurons on start up.
neuron_annotations.py: added note, must remove a costly loop over many
irrelevant parameters.
Fix error in neuron_annotation.py: a QuerySet is expected, not a list.
Fix typos in comment
Navigator: use javascript rather than python style for object keys.