Update to Prototype 1.5.0_rc1

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5012 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

 *SVN*
 
+* Update to Prototype 1.5.0_rc1 [sam]
+
 * Added access to nested attributes in RJS #4548 [richcollins@gmail.com]. Examples:
 
     page['foo']['style']                  # => $('foo').style;

railties/CHANGELOG

 *SVN*
 
+* Update to Prototype 1.5.0_rc1 [sam]
+
 * Formally Deprecate the old rake tasks. [Koz]
 
 * Thoroughly test the FCGI dispatcher.  #5970 [Kevin Clark]