Some reorganization and implementation of ios bindings build

I guess you will probably argue against the maven changes. Basically if you want to keep hacking maven and running the whole shebang with integration-test or install, you'll need to bind to those phases, which I've written about in the readme. Otherwise, come on into the future and do simulator runs like this:

    mvn monotouch:deploy-sim

If you want to also do the ikvm build first

    mvn package monotouch:deploy-sim