Remove extra controls directory, add field-control template
Simply base getter/setter, change selectors to use ui property
Add to gallery, add initial SCSS
Break up chart components into separate modules, clean up stats, SCSS

The editable components for FieldDistributionChart
have been moved to a subclass. This class has been
renamed to simply FieldChart
Simplify field-control template, migrate elements to `ui` property
Merge branch 'query-workflow' into field-controls
Simplify API for interacting with various node types

Each type is a subclass of ContextNodeModel with type-specific logic
such as recursive validation and fetching for branch nodes.

Field and concept ids object keys have been renamed from
`id` and `concept_id` to `field` and `concept`. Support
exists for this change as of Avocado 2.0.21
Force the attributes to be parsed on ContextModel construction

Ensure `this` is returned for `clear` methods
Implement ContextNodeModel.fetch and ContextModel.fetch

Update ConceptForm to use this method
Merge branch 'query-workflow' into 86-contextnode
Merge branch 'query-workflow' into field-controls
Merge branch 'query-workflow' into field-controls
Merge branch 'query-workflow' into 86-contextnode
Override save and toJSON on ContextNodeModel

This provides a means of changing the internal state
of the node without making it visible to it's callers
(via toJSON).

Fix #91
Explicitly reset collections on session open

This is necessary due to a change in Backbone 1.0.0+ where collections
will be updated in-place by default (and thus not reset). This ensures
the collection is reset and the 'reset' event fires.

This fixes the issue that caused the collection never to resolve
itself because the 'reset' event did not fire.
Merge branch 'query-workflow' into 86-contextnode
Refactor where UI context-based actions are available

For field-level contexts, the UI components have been moved from
FieldControl to FieldForm. This improves FieldControl by focusing
the view on operating on the condition operators and values.

Actions have been added to ConcepForm which operates at the
context-level.

The FieldForm and ConcepForm implements should remain consistent
(and will most likely be broken out into a base class) to enable
interchangeable use of the two. The concept-level context _may_
contain more than one field, but the ways it add/updates/removes
the condition is transparent.
Add explicit BranchNodeModel.save to recurse over childrem

The base ContextNodeMode.save now performs a shallow clone of
`attributes`. This is prevent deep-copying instances. As a result
the BranchNodeModel extends this behavior to recurse over children
and _gather_ their publicAttributes.
Simplify ConceptForm field and chart rendering

Remove nesting of `context` option within `data` object on
FieldChart instances.

One note is that the creation of the chart here may be redundant
since FieldForm can handle creating it's own chart. However the
location of the rendering the chart (i.e. within .concept vs
.field) must be taken into account as well.
Merge branch '92-actions' into field-controls