Add apple.py, a reimplementation of fruitstrap.c in Python.

Installs, uninstalls, lists, and runs applications on a non-jailbroken
iOS device connected to an OS X machine.

gdb was no longer working for certain applications, and this was easier than
figuring out how Xcode makes LLDB talk to a remote iOS debugserver.

* Has support for basically all of the same features as before, in addition to
  uninstalling and listing applications.

* Talks directly to the remote debugserver, so that running is not sensitive to
  differences in debuggers, finding symbols, ...

* Can possibly be made to work on Windows without too much effort.