Move source files to directory named for top-level package.
Fix whitespace to be a TAB instead on spaces in Makefile. *le sigh*
Change license string for PyPI to be the license name, not the copyright.
Move GPG._sign_file() to GPGBase since it's never called directly.
Add tests package __init__.py.
GPG.encrypt_file()→GPGBase.encrypt() and fix doctests and documentation.