Move PYRO-NN-Layers submodule

.gitmodules

-[submodule "PYRO-NN-Layers"]
-	path = PYRO-NN-Layers
-	url = https://github.com/csyben/PYRO-NN-Layers.git
+[submodule "src/pyronn_layers/PYRO-NN-Layers"]
+	path = src/pyronn_layers/PYRO-NN-Layers
+	url = git@github.com:csyben/PYRO-NN-Layers.git

MANIFEST.in

+recursive-include src/pyronn_layers/PYRO-NN-Layers *

PYRO-NN-Layers @ 6855c70f

+Subproject commit 6855c70fab5fdd70396b642aab6abc7cb1685e87

src/pyronn_layers/__init__.py

@@ -2,11 +2,11 @@
 import glob
 import os.path
 
+import pystencils_autodiff.tensorflow_jit
 import tensorflow as tf
 from pkg_resources import DistributionNotFound, get_distribution
 
 import pyronn_layers
-import pystencils_autodiff.tensorflow_jit
 
 try:
     # Change here if project is renamed and does not equal the package name
@@ -18,7 +18,7 @@ finally:
     del get_distribution, DistributionNotFound
 
 
-_pyronn_layers_dir = os.path.join(os.path.dirname(__file__), '..', '..', 'PYRO-NN-Layers')
+_pyronn_layers_dir = os.path.join(os.path.dirname(__file__), 'PYRO-NN-Layers')
 _pyronn_layers_sources = glob.glob(os.path.join(_pyronn_layers_dir, '*.cc'))
 
 assert _pyronn_layers_sources, "Could not find the source files of PYRO-NN-Layers.\n" \