Too-long title causes auto-tweet to fail & Camel to die

[cliss]

If a post is created with a really long title, Twitter will balk at the auto-tweet because it's too long, and that will take Camel down due to this line.

The auto-tweeter should be changed to:

• Consider how long a link is once shortened by Twitter
• Consider how long the suffix is (right now, \n\n)
• Automatically truncate long titles if they're over the computed maximum length.

[cliss]

Fixed in 5204e15.