Twitter App commit

[zephos64]

@nesquena Here is the twitter app. I added pull to refresh, counting characters left you can have in compose. Also improved the UI to better match Twitter's

[nesquena]

:+1: nice work overall. A few notes after checking out the code:

• Nice to see you used the PullToRefresh library
• Good to see you added the tweet to the home timeline after you posted new on compose
• Nice touch with the character count being calculated for Compose
• Consider adding ActiveAndroid to the Tweet and User. See the persistence guide and this other guide for more details.

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