Fixed mapping of org groups to objects being created on import
Removed ability to add documentation for control import
Add mapped documents to Objective tree
Look ma, no hands!

* dynamically create (almost) all widgets on Program page
* dynamically create People/Documents widgets on all pages
* add "loading"/"loaded" events to TreeView
* fix linking People/Documents to Directive instances
Remove now-unused templates
Add disclaimer back to Objectives and Controls widgets
Add backrefs from UserRole to Person and Role models
Merge pull request #246 from reciprocity/feature/objective-document-mapping

Add mapped documents to Objective tree
Merge pull request #247 from reciprocity/feature/fix-delete-role

Add backrefs from UserRole to Person and Role models
Merge remote-tracking branch 'origin/develop' into feature/org_group_mapping_fix

Conflicts:
	src/ggrc/converters/base_row.py
Merge pull request #244 from reciprocity/feature/org_group_mapping_fix

Fixed mapping of Org Groups to newly created sys/procs on import
Remove categories from resources and forms
Enable '__limit' query parameter and apply to Event model
Merge pull request #248 from reciprocity/feature/kill-cats-enable-paging

Temporarily remove categories from interface; enable __limit parameter
Add mustache helper 'using' and apply to 'owner'

* 'using' ensures arguments are fully loaded before rendering content
Load info widget entirely client-side
Three minor fixes

* fix load order of widgets
* don't trigger related object loading quite so soon
* infer type from page_object, not page_model
Enable linking Objectives to Controls
Apply '{{#if expanded}}' to more trees and fix counts

* sub-tree counts were being applied to widget titles -- now the event
  is suppressed correctly
* now using {{#if expanded}} to prevent loading of external resources
  from within tree items
Fix Section edit and delete