Merge pull request #53 from echarles/jsp

Initial implementation to support JSP pages in sitebricks
Initial implementation of validation code
more work for validation on page and rest, error keys are added in the response, tests are working - still need to add some i18n functions for the error message
fix for generic cast typesafety
add guard against npe when creating the errors
move ValidationUtil to converter module
Add errors widget + related tests
More tests + i18n the error messages
remove unused import
add public and Target on ResourceBundle annotation to try to fix jenkins build
add missing ResourceBundle and restore Message annotation, jenkins should be happy now
remove unneeded import
implement param via method + validation on the given params
implement param via method + validation on the given params
javadoc
Merge branch 'validation' into jsp-aos