0.9.1

A small release that only includes 3 changes:

1. A presenter specifically designed for Syntastic
2. STDOUT/STDERR/STDIN definitions are now treated as instances meaning method
   calls such as reopen are processed correctly.
3. ruby-lint now enforces the use of the latest Racc version as this version
   contains various performance improvements that are especially noticeable on
   Rubinius.

The Syntastic presenter is the most important addition as it allows me to
finally publish my Syntastic plugin without having to use various Vim hacks to
make it properly consume ruby-lint output.