Added "property to member" plugin for JSDoc

This automatically fixes usage of the form

    /** desc
    * @property {T} name - desc

To

    /** desc
    * @member {T} name

Being careful to only make the transformation when it is logical to do and preserving both descriptions as appropriate.
JSDoc Property to member - slight combining update
PIXI-in-Docs - Initial

- Initial support for generating PIXI-combined documentation
- Includes yuidoc-to-jsdoc for generating pixi-jsdoc.js
- Creates doc (using pixidoc + builddoc) tasks
- Adds sourceproxy JSDoc plugin to map in corrected file/line meta
- Added yuidocjs as a dev-dependency
PIXI-in-Docs - making jshint happy
PIXI-in-Docs fixups

- Removed hard-coded path (oops)
- Added grunt task (oops)
- Added EOLs
PIXI-in-Docs: prop support

- Added support for nested/ad-hoc properties
- Also cleanup and documentation / limitation notions
PIXI-in-Docs: visibility fix

- Private methods were not being annotated as such
PIXI-in-Docs: fixed line numbers

- Also added support for various additional meta-tags
- Minor code cleanup
Merge pull request #1287 from pnstickne/wip-props-to-members

Docs: PIXI Integration and "property to member" decorator for JSDoc