#213. Started bringing back comment feature.
Merge branch '7.x-1.x-alpha' into 7.x-1.x-alpha-issue-213
Changed drupalgap_attributes() to allow empty attributes.
Added form.disabled feature to the Forms API.
#213. Changed drupalgap_entity_add_core_fields_to_form() to use the elements returned from drupalgap_entity_get_core_fields() rather than rebuilding them. Removed all the code from the deprecated function drupalgap_entity_assemble_data(). Changed drupalgap_entity_get_core_fields() to better handle comment settings.
Updated binary.
#213. Fixed the form bundle on comment_edit().
Added informative warning messages for improper usage of drupalgap_field_info_instance().
Updated binary.
#213. Changed node_page_view_pageshow() to handle the loading of comments, and then inject the page on success, otherwise it will just inject the page if comments are disabled.
Removed old copy of drupalgap_get_path().
#213. Added comment_list_id(), comment_services_postprocess(), theme_comment().
#213. Improved node_page_view_pageshow() to use theme('comment', ...).
Updated binary.
Change theme_item_list() to add an h2 title to the list if one is provided.
#213. Add comment profile pictures and created time to theme_comment().
Stop drupalgap_entity_render_content() from continuing if no fields are found.
Update binary.
#213. Change comment_edit() to use system wide cancel and delete buttons.
#213. Change drupalgap_entity_render_content() to grab the bundle from comments. Change entity_services_request_pre_postprocess_alter() to iterate over comment index results and render their content onto the result object.