Release 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.