Added the following properties to Sketch ViewProvider:
* 4 bools to enable/disable parts of automation
* TempoVis property to hold instance of TempoVis python object, that helps with the automation
A module for gathering code related to visibility automation and the like.
Contains DepGraphTools.py and TempoVis.py, to be withdrawn from
Part/AttachmentEditor.
Also: changes to TempoVis:
* keep TempoVis from from raising
(TempoVis is non-essential functionality, so breaking execution of
unsuspecting routines that use it seems like a bad idea.
* implement saving/restoring camera
(Unfortunately, I failed to implement nice animated restoration.)
* almost proper support of saving to file
(I still couldn't figure out a way to restore reference to document and
viewer. So, falling to using active ones instead (might cause bugs).)
Add FREECAD_USER_DATA environment variable required to support snap on ubuntu which is using Apparmor to
limit application access to filesystem.
Add automatic snap build on Xenial (ubuntu 16.04) within Vagrant build
Info Build results are into /home/vagrant/Results (deb + snap
* Allow mesh-based windows (with non-solid shape) to pass through
* Allow precast elements to be clones
* Structure elements now display a different icon when thry are clones
* Arch clones now get the same placements as their cloned object on create
* Fixed the bad export of clones to IFC
* Recoded the Site/Building/Floor IFC export to be more flexible
Creating a mesh generator resets a critical data structure and makes all existing meshes invalid. Hence the SMESH_gen is made a singleton and all FreeCAD code is changed accordingly.
