Split a tweet into blocks in not only space but also newline

[amane-katagiri]

I changed draw function to split tweets by not only space but also newline.

A URL/screen_name/hashtag/... block contains an extra text if it end in newline, because draw function splits a tweet into a block by only space.

Example:

Visit this page !! http://example.com/
これが私のウェブサイトです。

If the example is splited by only space, http://example.com/\nこれが私のウェブサイトです。 is colored. My change adds a color to only http://example.com/\n.