Chaquopy: Python for Android

Jun 8, 2018

Demo app:
* Create PythonConsoleActivity background thread from Python rather than Java

SDK:
* Add Python.getPlatform and AndroidPlatform.getApplication.
* Make sure __spec__ is set on modules which are loaded by direct calls to the loader, or via imp.
* Fix hashlib OpenSSL integration.
* Fix pip --no-binary option.
* Improve up-to-date checks on Gradle tasks.