[ADD] check for Application Support (updated) version of _site dir
[CHANGE] DTCViewController and all subclasses to refer to self.bundleToUse instead of [[NSBundle mainBundle] bundleURL]
Flesh out logic for checking bottleneck, fetching update
[NEW] ZipDownloader class (based on ZipDownloadSpike), along with project files (libz.dylib, SSZipArchive files)
Improve look of sync bar animation