Cap comment cell height to 3 lines of text

When calculating the rect for the text view, set the max height to approximately what three lines of text would measure to.

Fixes #806
adds support for linking directly to a post in the reader
pops to root view of ReaderPostsViewController upon open of external link
Fix toolbar animation when invoking from posts/pages list
Present the modal from the rootViewController.
Use the correct width when calculating row heights.
NSJSONSerialization not deserializing with mutable collections

We switched JSON libraries this release, and the behaviors were slightly different.
Fixed XIB name in notification controller to prevent crash w/file not found
Don't change self hosted section on blogs list.

Fixes #813
fixes crash when attempting to sync comments from an RSS feed
Merge branch 'develop' into feature/twitter-linking
removes updateFromDictionary from public methods
updates ReaderPostDetailViewController alloc with new initWithPost method (from merge)
Merge pull request #818 from wordpress-mobile/issues/758-cell-date-cut-off

Use the correct width when calculating row heights.
Merge pull request #815 from wordpress-mobile/issues/814-editor-toolbar-animation

Fix toolbar animation when invoking from posts/pages list
Merge pull request #819 from wordpress-mobile/issue/793-Notification-Crash

Fixed XIB name in notification controller to prevent crash w/file not found
Merge pull request #807 from wordpress-mobile/issues/806-comment-cell-height

Cap comment cell height to 3 lines of text
Merge pull request #816 from wordpress-mobile/issues/797-page-editor-modal

Present the modal from the rootViewController.
Merge pull request #820 from wordpress-mobile/issue/738-Note-Follow-Crash

NSJSONSerialization not deserializing with mutable collections
Merge pull request #821 from wordpress-mobile/issue/813-crash-removing-self-hosted

Don't change self hosted section on blogs list.