Cleanup up gemspec file and added some comments to it.

active_olap.gemspec

@@ -1,15 +1,18 @@
 Gem::Specification.new do |s|
   s.name    = 'active_olap'
+
+  # Do not update version and date by hand: this will be done automatically.
   s.version = '0.0.2'
   s.date    = '2008-12-23'
 
-  s.summary     = "Extend ActiveRecord with OLAP query functionality"
+  s.summary     = "Extend ActiveRecord with OLAP query functionality."
   s.description = "Extends ActiveRecord with functionality to perform OLAP queries on your data. Includes helper method to ease displaying the results."
 
   s.authors  = ['Willem van Bergen']
   s.email    = ['willem@vanbergen.org']
-  s.homepage = 'http://github.com/wvanbergen/active_olap/wikis'
+  s.homepage = 'http://wiki.github.com/wvanbergen/active_olap'
 
-  s.files = %w(MIT-LICENSE README.textile Rakefile init.rb lib lib/active_olap lib/active_olap.rb lib/active_olap/aggregate.rb lib/active_olap/category.rb lib/active_olap/configurator.rb lib/active_olap/cube.rb lib/active_olap/dimension.rb lib/active_olap/helpers lib/active_olap/helpers/chart_helper.rb lib/active_olap/helpers/display_helper.rb lib/active_olap/helpers/form_helper.rb lib/active_olap/helpers/table_helper.rb lib/active_olap/test lib/active_olap/test/assertions.rb spec spec/integration spec/integration/active_olap_spec.rb spec/spec_helper.rb spec/unit spec/unit/cube_spec.rb tasks tasks/github-gem.rake tasks/spec.rake tasks/test.rake test test/active_olap_test.rb test/helper.rb test/helper_modules_test.rb)
-  s.test_files = %w(test/active_olap_test.rb test/helper_modules_test.rb)
-end
+  # Do not update files and test_files by hand: this will be done automatically.
+  s.files      = %w(test/helper_modules_test.rb spec/spec_helper.rb .gitignore lib/active_olap/helpers/table_helper.rb lib/active_olap/dimension.rb test/active_olap_test.rb lib/active_olap/helpers/display_helper.rb init.rb README.textile spec/integration/active_olap_spec.rb lib/active_olap/test/assertions.rb lib/active_olap/category.rb active_olap.gemspec Rakefile MIT-LICENSE tasks/github-gem.rake lib/active_olap.rb test/helper.rb lib/active_olap/helpers/form_helper.rb lib/active_olap/aggregate.rb spec/unit/cube_spec.rb lib/active_olap/helpers/chart_helper.rb lib/active_olap/cube.rb lib/active_olap/configurator.rb)
+  s.test_files = %w(test/helper_modules_test.rb test/active_olap_test.rb spec/integration/active_olap_spec.rb spec/unit/cube_spec.rb)
+end