Fix #360
Plot Action disabled for subset group selection

Closes #364
Facet fix
Merge pull request #361 from ChrisBeaumont/360

Bugfixes
Defer dependency imports

permits glue_deps to run without any dependencies

Closes #368
Document Kubuntu workaround

Closes #366
Merge pull request #369 from ChrisBeaumont/deps

Defer dependency imports
Watch files for changes
docstring
Test coverage
Auto refresh config toggle (default=False). Auto-refresh sphinx doc.
Merge pull request #363 from ChrisBeaumont/liveupdate

Live reloading of files
Layouts don't overlap
Preset layouts
New layout snap algorithm in GUI