Add missing lf-burden thread tag

Tag isn't new, but it was missing for some reason.
Delete unused code.
Hello CocoaPods.
Delete CSS Tweaker.
Acknowledge third-party libraries in Settings bundle.
Version bump to 1.11.5.
Goodbye mustache.js, hello GRMustache.

The endless WebKit crashes continue, and I'm down to my last idea: move as much
as possible out of the UIWebView. Rendering mustache templates in Objective-C
is the first move. As an added benefit, it cleans up the build process a bit.

This commit also introduces the concept of a "view model" to Awful. These are
model objects for a Mustache template. They're handy for compound properties
(those derived from several properties on the underlying model object), default
values, and formatters. There's one for posts and another for profiles.
Fix broken posts view actions.

Accidentally broke the post action button, following URLs, etc.
Remove empty "edited by" paragraphs in posts.

SA sends down a <p class="editedby"> regardless of whether a post is edited.
When we use JSON data, however, we don't render such a paragraph. Removing it
from the HTML makes things more consistent: the paragraph only exists when it's
nonempty.
Move posts/PM view loading screen to proper UIViews.

Continuing the process of moving as much as possible out of the UIWebView; this
time it's spin.js and showing any particular loading screen.
Switch Macinyos color in theme picker to an OS 9 purple.

I think it was one of the default backgrounds? Has a tiled embossed Finder icon.
Bump secondary thread tag up and left 1pt.

Looks nicer (via @ridilla). The -setTagBorderColor:width: method on
AwfulThreadTagView is necessary because thread cells would set the tag view's
layer's border, which draws over the secondary thread tag. Setting the border
of the tag's image view does what we want.
Don't double up on secondary thread tag banners.
Add Xcode file templates that use Awful's copyright line.
Stick to System 7-era colors for Macinyos theme picker.
Handle tap gestures on profile view in Obj-C, not Javascript.

Continuing to move stuff out of UIWebView.
Handle posts view gestures in Objective-C.

Last move of code from JavaScript to Objective-C.
Use stock zepto.js and unify Awful's JavaScript.

By using stock zepto.js and combining Awful's JavaScript, the build process can
be much simpler.
Fix Crashlytics configuration.

Forgot to update path when moving to .xcworkspace.
Remove unused code.