Added ssd_keras sub-module

Signed-off-by: Jim Martens <github@2martens.de>

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "src/twomartens/masterthesis/ssd_keras"]
+	path = src/twomartens/masterthesis/ssd_keras
+	url = https://github.com/2martens/ssd_keras

setup.py

@@ -35,7 +35,8 @@ setup(
     package_data={},
     entry_points={},
     python_requires="~=3.6",
-    install_requires=["tensorflow-gpu", "Pillow", "h5py", "numpy"],
+    install_requires=["tensorflow-gpu", "Pillow", "h5py", "numpy", 'opencv-python', 'scikit-learn', 'tqdm',
+                      'beautifulsoup4'],
     license="Apache License 2.0",
     classifiers=[
         "Operating System :: OS Independent",