Reorganize into typical python package

This is the somewhat standard python package source organization, should
make it easier later on.

Paths are not updated in this commit, meaning that most imports will
probably fail.

MANIFEST.in

+include tox.ini

setup.py

+"""Yggdrasil
+"""
+
+from setuptools import setup, find_packages
+
+setup(
+    name='yggdrasil',
+    version='0.1',
+    description="",
+    author="Thomas Lavocat",
+    author_email="tlavocat@april.org",
+    url='',
+    license='GPL3',
+
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+    ],
+
+    packages=find_packages(),
+    install_requires=['pyzmq', 'pexpect'],
+    scripts=['bin/erebor', 'bin/socket-bridge']
+)