Work around setuptools issue 230 to ease dev

Move src/* to src/bap and update setup.py package_dir for workaround
With this, python setup.py develop and pip install -e both work again

Author: mikea1729

setup.py

@@ -11,7 +11,7 @@
     maintainer = 'Ivan Gotovchits',
     maintainer_email = '[email protected]',
     license = 'MIT',
-    package_dir = {'bap' : 'src'},
+    package_dir = {'' : 'src'},
     packages = ['bap'],
     extras_require = {
         'rpc' : ['requests']