Update ruby-hoe package to 2.9.1.

Update ruby-hoe package to 2.9.1.

=== 2.9.1 / 2011-02-05

* 1 minor enhancement:

  * Sow now creates all template directories before dealing with anything else

* 3 bug fixes:

  * Fixed dependency order bug with prereleases [erikh]
  * Fixed sanity check for prereleases.
  * Fixed sow when passed no args. [erikh]

=== 2.9.0 / 2011-01-31

* 11 minor enhancements:

  * Added Hoe::Package#pkg_path to make package hook writing easier.
  * Added Hoe::Test#test_prelude to allow for code to run before test loading.
  * Added plugin?(name) to allow for easier plugin guarding in hoe spec.
  * Added support for multiple template dirs for sow.
  * Added support for rubygems-test. See http://www.gem-testers.org/
  * Clean up sow a LOT using: include FileUtils::Verbose
  * Don't warn about missing plugins without rake -t
  * Hoe requires Gem::PackageTask from RubyGems 1.4+
  * Moved post_news from publish to rubyforge
  * Plugins can now be loaded from a +plugins+ array in ~/.hoerc
  * rubyforge plugin now uses plain globs to push. Fixes releases for rubygems itself

* 4 bug fixes:

  * Failed plugins should notify on both trace and debug.
  * Fixed rdoc_dir for custom rdoc locations
  * Fixed require 'rubyforge' that was too late
  * Fixed sow to properly rename dirs depth first

=== 2.8.0 / 2010-12-08

* 6 minor enhancements:

  * Added PRE=a.1 variable to package and release tasks. (ged)
  * Added compiler plugin to support rake-compiler. (tenderlove)
  * Added known_plugins task and updated included and 3rd party plugins doco
  * Added racc/rex plugin!
  * Extended sow's Rakefile template to dynamically include installed plugins
  * Turned off rubyforge plugin by default. (tenderlove's whining)

=== 2.7.0 / 2010-11-15

* 2 minor enhancements:

  * Added new plugin: gem_prelude_sucks. (jbarnette)
    * Activate under 1.9 if you don't want it messing with you.
  * Added rspec2 support (bleything)

* 1 bug fix:

  * require uri in hoe/deps (raggi)