Implementing New RT view. But not yet working.
Implemented function "Create New RT"
Merge branch 'asyncloader' into debug
Use 4spaces instead of tabs
Now TweetItem and RetweetItem have its own database's id.

And created function getting status from db with specified db's id
Now itemAdapter isn't initialized when go back to Main Fragment so that
no need to fetch certain Retweet twice.
Created toast that shows successfully created new TW/RT.
Improved some UIs.
Implemented item delete button.
Implemented reload button
Merge branch 'debug'