updating UI documentation

Summary:
adding documentation for more of our UI components.

Deleted some unused components, which were not working anyways.

Reviewed By: jknoxville

Differential Revision: D12896109

fbshipit-source-id: 959c7864240883869ad67283f80a3c189b94bf00

website/generate-uidocs.js

@@ -95,9 +95,9 @@ function generateMarkdown(component) {
       }
 
       // escape pipes and new lines because they will break tables
-      type = type.replace(/\n/g, ' ').replace(/\|/g, '|');
+      type = type.replace(/\n/g, ' ').replace(/\|/g, '⎮');
       description = description
-        ? description.replace(/\n/g, ' ').replace(/\|/g, '|')
+        ? description.replace(/\n/g, ' ').replace(/\|/g, '⎮')
         : '';
 
       props += `| \`${prop}\` | \`${type}\` | ${description} |\n`;