Twitter-markov

-----
* Allow for 280-character tweets
* Raise a `RunTimeError` if model fails to compose anything.

-----
* refactor TwitterMarkov.compose to use make_short_sentence.
* Add max-len and state-size options to cli.
* change default state size to 2

-----
* ignore tweets with blacklisted words when replying
* refactor checking module
* expand docs
* bump required twitter_bot_utils

-----
* Remove one per line option
* Expand docs

-----
* Add option to create a corpus from a file with one text per line

-----
* Fix a double-logging bug