fixed bug in invalidate_deps in ndepgraph
Last saved based off of last modified file in project.
Writing tests for last saved metadata for projects.
Last saved works by checking all files within project.
last_saved metadata based off of modified timestamp of _settings.cfg project file.
Finished test. Bug is fixed.
Merge remote-tracking branch 'upstream/dev' into fix-last-modified-stamp
Merge branch 'fix-last-modified-stamp' of https://github.com/crobinsonut/OpenMDAO-Framework into fix-last-modified-stamp
Merge pull request #1439 from crobinsonut/fix-last-modified-stamp

Fix last modified stamp
work
undo a thing
fixes to get a few gui tests working
- don't need update_workflows (?)
- don't search for a driver in it's own workflow
- no pre-determined dataflow order for unconnected components in an assembly
trying to get array slice params to work across assy byd
Preliminary support for array slices - single elements work now
array slicing works (i think)
more fixes
small ffd fix
fix assembly.get_dataflow() to use component_graph
temp fix for component.get_attributes(), comment out scaler/adder for now
fixed connection error in engine example
merged out from Ken