some refinements, bump versions already

python/install_py_bindings.sh

@@ -3,5 +3,5 @@
 set -ex
 
 cargo build -p deltachat_ffi --release
-rm -rf build/ 
+rm -rf build/ src/deltachat/*.so
 DCC_RS_DEV=`pwd`/.. pip install -e .

python/src/deltachat/__init__.py

@@ -2,7 +2,7 @@ from deltachat import capi, const
 from deltachat.capi import ffi
 from deltachat.account import Account  # noqa
 
-__version__ = "0.10.0.dev3"
+__version__ = "0.10.0.dev4"
 
 
 _DC_CALLBACK_MAP = {}

python/src/deltachat/message.py

@@ -206,7 +206,6 @@ class MessageType(object):
         return self._type == const.DC_MSG_FILE
 
 
-
 @attr.s
 class MessageState(object):
     """ Current Message In/Out state, updated on each call of is_* methods.