Merge branch 'release/0.2' into develop
Change `STCPluginForTweetbotMac` to use swizzle `-[NSUbiquitousKeyValueStore dictionaryForKey:]` for detecting change of `NSUbiquitousKeyValueStore`

Because `NSUbiquitousKeyValueStore` does not send `NSUbiquitousKeyValueStoreDidChangeExternallyNotification` when changing comes by calling `-[NSUbiquitousKeyValueStore synchronize]`. On awaking from sleep, *Tweetbot* calls `-[NSUbiquitousKeyValueStore synchronize]`. It caused out of sync.
Change using from `-[NSUbiquitousKeyValueStore dictionaryForKey:]` to `-[NSUbiquitousKeyValueStore dictionaryRepresentation][key]`
All protocols incorporate `NSObject` protocol in `TwitterMacProtocols.h` and `TweetbotMacProtocols.h`
Add `+[SyncTwitterClient lastReceivedPositionForTimeline:]`
Add swizzling `-[TMStatusStreamViewController streamDidUpdate:]` to `STCPluginForTwitterMac`

For detecting update of stream while *Twitter* is out of sync.
This will be enable delayed sync on awaking from OS X sleep.
Bump `MinBundleVersion` of “com.tapbots.TweetbotMac” to *Tweetbot for Mac* v1.4.1
Version 0.3
Update README.md
Merge branch 'release/0.3'