Upgraded Spring to 3.2.3
REST: Optimize 'withFormat' method and existing mimetypes APIs
REST: fix resource mappings 3-level deep
Merge pull request #351 from bobbywarner/spring-upgrade

Upgraded Spring to 3.2.3
REST: Add new feature to capture optional file extension which gets converted into 'format' parameter for the purposes of REST calls. This fixes the problems introduced by UrlMappingsFilter.areFileExtensionsEnabled() and the need to globally configure this behavior (it can instead by specified on a mapping by mapping basis)
Merge branch 'master' of github.com:grails/grails-core
GRAILS-10092 - change controllerNamespace to namespace
reorganize some constants
Merge branch 'master' of github.com:grails/grails-core
REST: Fix UrlMappingsFilter to no longer strip the file extension and use the URL mappings engine instead
GRAILS-10092 - improve redirects to/from namespaced controllers

When redirecting from a namespaces controller, if no namespace is specified for the redirect, the redirect will be directed to a controller in the same namespace as the one initiating the redirect.  To redirect from a namespaced controller to a non-namespaced controller, namespace:null must be specified.
Added a new @Transactional annotation for Grails that uses AST transformations instead of Spring proxies. Built at Gr8conf Hackergarten 2013
Merge branch 'master' of github.com:grails/grails-core
optimize method dispatch to transactionTemplate.execute
Merge branch 'url-mappings-changes'
fix double wildcard handling
REST: Change the default UrlMappings for new apps to include the response format in the URL pattern
fix indentation
don't proxy Grails' @Transactional  and add annotation to new service classes by default
GRAILS-9190 - improve content type checking

accept text/json, application/json, text/xml and application/xml