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.
Remove unnecessary logs.
Round displayed post rate to the nearest hundredth.

Inexact floats don't need a dozen decimal places shown in user profiles.
Reorder thread action sheets for sanity, less movement.

In the posts view thread actions, stuff shouldn't shift around when the thread
is closed because of no "quote" or "edit" button.

In the thread list thread actions, "jump to first page" and "jump to last page"
should follow one another.
Ensure all browser actions appear even before page loads.

Until the page loads, the web view's request's URL is the empty URL. This makes
the action sheet useless and hides options that should be available.
Comment cleanup.
Forgot to point to renamed .pch in xcodeproj.
Simpler Crashlytics configuration build step.
Update readme for Crashlytics and JavaScript.
Fix building without Crashlytics API key.

The app delegate checks whether CRASHLYTICS_API_KEY is defined at all, using
that to bypass a pointless init call to the Crashlytics code. The build script
needs to truncate the header file if there is no Crashlytics API key.
Posts view with unread posts hides "scroll to bottom" bar.

It's nice to show it by default when the posts are all read, so it's quick to
scroll to the bottom. But it's just in the way when there are unread posts.