Add convenience methods for annotations, shapes, and images#1817

Merged

jonmmease merged 8 commits intomasterfrom update_annotations

Oct 15, 2019

Commits on Oct 6, 2019

Initial _select_annotations_like helper method
jonmmease
committed

Commits on Oct 7, 2019

select/for_each/update annotations methods
jonmmease
committed

Commits on Oct 12, 2019

code generation for select/for_each/update annotations/shapes/images
jonmmease
committed

Commits on Oct 14, 2019

Commits on Oct 15, 2019

Add add/select tests without row/col on figure not created with make_subplots
jonmmease
committed
Rename add_image to add_layout_image to avoid conflict with future image trace
jonmmease
committed