Uso AsyncTask para request http

git-svn-id: https://tdam-2013-g5.googlecode.com/svn/trunk@114 0117bdac-9510-e2bd-253c-24df4fda417d
Agregue RegisterUserTask

git-svn-id: https://tdam-2013-g5.googlecode.com/svn/trunk@115 0117bdac-9510-e2bd-253c-24df4fda417d