Rake uses depreacated tasks

[stoune]

When running rake tasks you will receive a warning message:

$ rake test
rake/gempackagetask is deprecated.  Use rubygems/package_task instead
rake aborted!
cannot load such file -- rake/extensiontask

(See full trace by running task with --trace)

[rtomayko]

Fixed in #67.

[hramrach]

Please make it make sense: bundle install If 'bundle' is not a typo you can use command-not-found to lookup the package that contains it, like this: cnf bundle