About: Add various pages to a new "Project" meta category

Meta:
* About jQuery UI
* Browser Support
* Development Center
* jQuery UI Changelogs
* jQuery UI Upgrade Guides
* Support Center

This should improve discoverability by not relying solely on the top
navigation bar for these kinds of pages.

For example, "Browser Support", "Changelogs" and "Upgrade Guides"
are already not in the top bar and are only found through search
or through a link in the content on the homepage.

Closes gh-229
Ref jquery/jquery-wp-content#487

Author: Krinkle

page/about.md

@@ -1,5 +1,8 @@
 <script>{
-	"title": "About jQuery UI"
+	"title": "About jQuery UI",
+	"termSlugs": {
+		"category": [ "meta" ]
+	}
 }</script>
 
 jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control, jQuery UI is the perfect choice.

page/browser-support.md

@@ -1,5 +1,8 @@
 <script>{
-	"title": "Browser Support"
+	"title": "Browser Support",
+	"termSlugs": {
+		"category": [ "meta" ]
+	}
 }</script>
 
 ## Current Active Support

page/changelog.md

@@ -1,5 +1,8 @@
 <script>{
 	"title": "jQuery UI Changelogs",
+	"termSlugs": {
+		"category": [ "meta" ]
+	},
 	"noHeadingLinks": true
 }</script>
 

page/development.html

@@ -1,5 +1,8 @@
 <script>{
-	"title": "Development Center"
+	"title": "Development Center",
+	"termSlugs": {
+		"category": [ "meta" ]
+	}
 }</script>
 
 <h2>Development Status</h2>

page/support.html

@@ -1,5 +1,8 @@
 <script>{
-	"title": "Support Center"
+	"title": "Support Center",
+	"termSlugs": {
+		"category": [ "meta" ]
+	}
 }</script>
 
 <p>The jQuery community provides a friendly, helpful environment to ask for

page/upgrade-guide.md

@@ -1,5 +1,8 @@
 <script>{
 	"title": "jQuery UI Upgrade Guides",
+	"termSlugs": {
+		"category": [ "meta" ]
+	},
 	"noHeadingLinks": true
 }</script>
 

taxonomies.json

@@ -19,6 +19,10 @@
 		{
 			"slug": "utilities",
 			"name": "Utilities"
+		},
+		{
+			"slug": "meta",
+			"name": "Project"
 		}
 	]
 }