Rewrite the Gantt chart. #6276

This version of the Gantt chart supports nested charts. So Projects,
Versions, and Issues will be nested underneath their parents correctly.

Additional features:

* Move all Gantt code to Redmine::Helpers::Gantt class instead of having it in
  the Gantt class, controller, and view
* Recursive and nest sub-projects
* Recursive and nest versions
* Recursive and nest issues
* Draw a line showing when a Project is active and it's progress
* Draw a line showing when a Version is active and it's progress
* Show a version's % complete
* Change the color of Projects, Versions, and Issues if they are late or
  behind schedule
* Added Project#start_date and #due_date
* Added Project#completed_percent
* Use a mini-gravatar on the Gantt chart
* Added tests for the Gantt rendering

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4072 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/gravatar/lib/gravatar.rb

@@ -26,6 +26,9 @@ module GravatarHelper
     # decorational picture, the alt text should be empty according to the
     # XHTML specs.
     :alt => '',
+
+    # The title text to use for the img tag for the gravatar.
+    :title => '',
     
     # The class to assign to the img tag for the gravatar.
     :class => 'gravatar',
@@ -48,8 +51,8 @@ module GravatarHelper
     def gravatar(email, options={})
       src = h(gravatar_url(email, options))
       options = DEFAULT_OPTIONS.merge(options)
-      [:class, :alt, :size].each { |opt| options[opt] = h(options[opt]) }
-      "<img class=\"#{options[:class]}\" alt=\"#{options[:alt]}\" width=\"#{options[:size]}\" height=\"#{options[:size]}\" src=\"#{src}\" />"      
+      [:class, :alt, :size, :title].each { |opt| options[opt] = h(options[opt]) }
+      "<img class=\"#{options[:class]}\" alt=\"#{options[:alt]}\" title=\"#{options[:title]}\" width=\"#{options[:size]}\" height=\"#{options[:size]}\" src=\"#{src}\" />"
     end
     
     # Returns the base Gravatar URL for the given email hash. If ssl evaluates to true,
@@ -82,4 +85,4 @@ module GravatarHelper
 
   end
   
-end
+end