issues/1649-noResultsView-refresh-flicker

only remove noResultsView from superview when there are results to show, Fixes #1649
issues/2176-settings-about-size

set webView width via meta tag in webViewDidFinishLoad for instances when we are showing a webView in a popover
Implements NSAttributedString Extension
Implements UITextView Extension
Implements RichTextView
Updates project
Set starting background color to match superview.
Updates WPRichTextView with new features.

Adds support for setting the background color of the interior text view.
Adds support for setting a specific set of text options
Implements sizeToFit.
Cleans up some stray comments.
Extends WPContentViewProvider for comments.
Use WPRichTextView instead of DTCoreText view.
Use const for constraints. Adds some padding.
Adopt WPCommentContentViewProvider protocol.
Remove cells delegate protocol in favor of CommentContentViewDelegate

Do not perform unnecessary content manipulation when preparing for reuse.
Make invalidate cached height method public.
NotificationDetailsViewController Cleanup
Splits ReplyTextView and Mentions code
Code Cleanup
RichTextView: Switching over to Autolayout
RichTextView: Wrapping up extra UITextView properties