ENH: Add Markups module providing easy fiducials management.

Based on the Annotations module from Slicer 4.2 and the Fiducials
module from Slicer 3.6, add a new Markups module to provide
some missing functionality into Slicer4:
- one file per fiducial list
- added a unique id and orientation for each fiducial
- save/restore default display settings
- create list with current list display settings
- press p to add a fiducial
- possible to "jump" to a slice using either mouse click or right click menu
- move fids between lists
- split displayable managers into 2d and 3d versions
- pattern for names of new fiducials
- projection on 2d viewers
- add a right click menu option to delete highlighted markups
- support markups selection by mouse and keyboard arrow key
- %N can be used in the markups name format string
- possible to toggle visible/locked/selected state for a list of markups
- uniform scale for both markup text and glyph

Also added a compare view self test.

See issue #2606
ENH: Add annotation and markup file loading

Add utility methods to allow loading Markup fiducials
from the python console, as well as a backward
compatible Annotation reader

See issue #2606
ENH: Support passing Markup fiducials to CLIs

Use the coordinate system flag to support RAS or LPS coordinates
for the points.

See issue #2606
ENH: Deprecating annotation fiducials

Edit properties in the Data module will go to the Markups module for
both Markups and Annotations fiducials, so that annotation fids
can be converted.

Unregister the Annotations fiducials IO, Markups can read .acsv files.
Add a label in the Annotations GUI that fiducials can be found in the Markups module.

See issue #2606
ENH: Replace Annotations with Markups in default favorite modules list.

See issue #2606
ENH: Update TractographyInteractiveSeeding module to support Markups

Allow usage of Markups fiducials or Annotations fiducials.

See issue #2606
BUG: Update Endoscopy module to support Markups

Added a backward compatibility call of GetNumberOfFiducials to the
Markups fiducial node.

See issue #2606