Fixes disabled properties and fixes property order

Option "no_additional_properties" is still behaving strange #209 —
allows initial properties to be re-added.

Maintain propertyOrder when using Object Properties #197
— uses already included property_order array
Use minLength and maxLength to determine grid columns for string editor. Fixes #212
Fix bug with the 0 not showing up in UI for integer fields. Fixes #215
Fix watched fields bug with string enum editor. Fixes #216
Change table description format to match array's. Fixes #219
Add new WYSIWYG example. Version bump.
Scopes the editor variable with var
Fix select2 support by moving initialization from `build` to `postBuild`.
Merge branch 'ebeeson-master'
Merge branch 'master' of https://github.com/kamikasky/json-editor into kamikasky-master
Merge branch 'kamikasky-master'
Fix duplicate variable, bump version.
Add upload editor based on base64
Upload file success using configured upload handler
Add progress bar for Bootstrap3 theme
Progress bar updates for unknown remaining
Upload callbacks grouped in callbacks object
Create download link when available
Add class for div with download link
File upload example