Add Custom Content Type

Add module for Custom Content Types and Portfolio CPT
Add Portfolio Shortcode CSS

Add default styles for portfolio shortcode
Remove AIOSEO

As per conversation with @georgestephanis
Alphabetical sort of conflicting OG plugins
Alphabetical sort of conflicting Twitter cards
Remove Yoast; add comment re our filter
JSON API: More consistency w/ other wording
Related Posts: Only load the stylesheet on the reading settings
Removed extra @font-face declarations

Hat tip @enejb
Trim whitespace from modules/*.php
REST API: Writing method must be accessed via POST
REST API: oops...this one too.
Merge pull request #828 from richardmtl/conflicting-og-cleanup

Conflicting og cleanup and alpha sort
Top Posts: Strip HTML from post titles

Prevents tags from being output along with the rest of the title:

https://github.com/Automattic/jetpack/issues/525
Merge pull request #873 from aheckler/master

Top Posts: Strip HTML from post titles
REST API: Modify plugins endpoints path.

Instead of
`/sites/:site_id:/plugins/:urlencoded_plugin_filename_without_dot_php:/<
action>/`, use : `/sites/:site_id:/plugins/<action>/ POST { plugin_id:
plugin_filename }`.

Adds simplicity to the path and flexibility for future bulk actions.
REST API: Fix endpoints path comment.
REST API: Modules: Stricter response format.

Adds more control over the information returned about each module.
REST API: Fix example request data.
REST API: Remove code tag ¿¿¿???