Use syntax highlighting in the readme file.
Merge pull request #2 from ming13/readme-syntax-highlighting

Use syntax highlighting in the readme file
Update Travis; we're going to test against Tornado 3, with and without Futures available
Style
Version -> +
Style
Require Tornado 3 and drop Python 2.5
Support Tornado 3 Futures in AsyncResult
Start a rewrite for to use Futures and match Tulip's API.
Make Queue.maxsize a property
Give up for now on using Lock and Semaphore with "with" statement
Lock.acquire() and Semaphore.acquire() can be used with "with" statement
Remove 2.5 from trove classifiers
Continuing rewrite for Tornado 3 and Futures
Fix exception handling for Python 3.2 and over
Mass doc update
Measure timeouts less precisely in tests to avoid spurious errors, and use 0.1 instead of .1 everywhere
No need for _TimeoutFuture.link method
Measure timeouts even less precisely
Cite Tornado-3-style "io_loop.time()" instead of "time.time()" in docstrings