run AskThem links in Twitter share through shortener

[davidmooreppf]

After launch :

http://www.askthem.io/ia/questions/52f25ec2f92ea109e1000006#

... Q copy when shared to Twitter, see about services to run long AskThem link through ::

Support my question to @ChuckGrassley on @AskThemPPF: How do you feel about the exponential growth in the role of private contractors in nat’l security?
http://www.askthem.io/ia/questions/52f25ec2f92ea109e1000006

[walter]

All links posted to Twitter get run through Twitter's shortener, I believe. I'm pretty sure the length of URLs don't count against character count.

[davidmooreppf]

Re-opening #295 for this fix. Cool.