Update hoe package to 3.0.3.

=== 3.0.3 / 2012-04-09

* 2 bug fixes:

  * Fixed racc plugin's gem dependency activation
  * Fixed rake multi's use of multiruby_skip.

=== 3.0.2 / 2012-04-03

* 1 bug fix:

  * Generate urls list properly in #announcement if you use k/v form

=== 3.0.1 / 2012-03-26

* 1 minor enhancement:

  * Uniqify hoe plugins in sow Rakefile template. (evanphx)

* 3 bug fixes:

  * Fixed have_gem? checks in the install_plugins task to match the install_gem calls.
  * Fixed homepage handling when bullet list used in readme. (evanphx)
  * Removed deprecated use of #url in publish plugin

(taca)