Enhance data plugin attribs for using inputs with multiple jquery plugins

[kartik-v]

For InputWidget, currently for each input, the two HTML5 data attributes are being generated:

• data-plugin-name the name of the plugin
• data-plugin-options the client options of the plugin

This works for most use cases when a single jQuery plugin is attached. However, when more than one jQuery plugin is attached to the input - it will overwrite to the last plugin registered.

A BC breaking fix will be provided for a way to register multiple plugins.

[kartik-v]

Resolved via upgrade to release v1.3.0.

Removed:

The following HTML5 data attributes are removed and not registered anymore with the input:

• data-plugin-name the name of the plugin
• data-plugin-options the client options of the plugin

Added:

The following HTML5 data attribute will be added for each input:

• data-krajee-{name} the client options of the plugin. The tag {name} will be replaced with the
  registered jQuery plugin name (e.g. select2, typeahead etc.). So this data attribute will be named something like data-krajee-select2, data-krajee-typeahead etc.

[thiagotalma]

Very nice!
For a cleaner HTML, how about: data-kj-select2, data-kj-typeahead?