Add spring-build 2.2.3 and ensure build succeeds.

spring-build was previously included via an svn:external. Adding
directly to the source tree under Git to avoid the need for a git
submodule.

In order to build from any earlier commit, it is recommended to
export spring-build or symlink an existing copy into the root
of the spring-framework project and then build normally.

$ svn export https://src.springsource.org/svn/spring-build/tags/project-build-2.2.3 spring-build

spring-build/scripts/project-gen/options.rb

@@ -0,0 +1,56 @@
+Choice.options do 
+  
+  header ""
+  header "Spring Build Project Generator v1.0"
+  
+  option :project_name, :required => true do
+    short '-n'
+    long '--name'
+    desc 'The name of the new project.'
+  end
+  
+  option :target do
+    short '-t'
+    long '--target'
+    desc 'The target directory in which to create the new project.'
+    default '.'
+  end
+  
+  option :organization do
+    short '-o'
+    long '--org'
+    desc 'The organization name to include in the ivy.xml file.'
+    default do 
+      project_name = Choice.choices[:project_name]
+      project_name.split('.')[0..1].join(".")
+    end
+  end
+  
+  option :archetype do
+    short '-a'
+    long '--archetype'
+    desc 'The archetype of the project you are creating.'
+    default 'standard'
+  end
+  
+  footer ""
+  footer "--help This message."
+  
+end
+
+# Nifty hack to support lazy defaulting of choices as they are retreived
+# Allows for blocks to be used as default values as well as static values
+c = class << Choice.choices; self end
+c.module_eval do
+  
+  alias :do_get :[]
+  
+  def [](name)
+    v = do_get(name)
+    if v.is_a? Proc
+      v.call
+    else
+      v
+    end
+  end 
+end