Added file idp.xml

The file idp.xml file contains the deployment fragment which allows
correct deployment.
Added task to copy idp.xml file to tomcat

A new task has been added which will place the new config file in the
right place in tomcat. This configuration allows proper deployment.
Added a task to create the /Catalina/localhost dir

The /Catalina/localhost/ dir will now be created if it does not exist
with the new task. This is important for the next task.
Added newline to file idp.xml

Added some whitespace to end of file to lessen potential errors with
output formatting.
Merge pull request #38 from ausaccessfed/feature/deployment-fragment

Added deployment fragment
Resolves #28