Refactored tree view to use instance's constructor->tree_view_options->show_view when not provided in the child_options for a sub-level; also added a new mapping for sections/objectives/controls, related_and_able_objects, to replace the former 4-5 smushed together subtrees
Added extended related object counts to the program tooltips on delay
Fixed space in Map: Person and example line.
Merge pull request #407 from reciprocity/feature/templatedownloadfix

Fix for import template spreadsheets
Updating model findOne methods and mappings
Added backup mapping support to the mapping_count helper and fixed some edge case issues
Fixed controls mapping counts
Remove extra cell with Jeff's email.
New process/system templates without Map:Category.
Add People import template button.
Factored out commonality in admin imports.
Change system/proc import column names and relationship cleanups
No data under headers will thrown exception but show preview error
Merge pull request #392 from reciprocity/feature/tree-nodes-choose-show-views

Tree nodes can choose their own show_view templates
Don't use the ggrc_basic_permissions module to provide permissions for
unit tests, there are no rbac tests in this test suite. RBAC tests are
in the behave test suite.
Merge remote-tracking branch 'origin/feature/popover_mapping_counts' into feature/delete_messaging
Added delete messaging helper along with support for Directive delete messaging
Added delete messaging support for Programs, Controls, Sections, and Objectives
Added delete messaging support for business objects and tweaked support for other object types
Added animation spinners to LHN mapping counts and delete messaging