Adding suppot for basepath and display name for deploy tool

added support for more control over proxy name and base path from deploy tool:
jsut add fields to the deploy_vars file
{
    "org":"MY ORG",
    "env":"MY ENV",
    "username":"username",
    "password":"", 
    "uri":"",
    "basepath":"base path to use",
    "displayname":"display name"
}