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
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.