move doc to docs as it is more consistent, use new features of edgy.project to generate setup.py with data files

bonobo/__init__.py

@@ -7,4 +7,9 @@ PY35 = (sys.version_info >= (3, 5))
 
 assert PY35, 'Python 3.5+ is required to use Bonobo.'
 
-__version__ = '0.0.0'
+# Version infos
+try:
+    with open('../version.txt') as f:
+        __version__ = f.read().strip()
+except:
+    __version__ = 'dev'