Removing strict version in requirements.txt
-audioread == 2.1.4
-jsonpickle == 0.9.5
-librosa == 0.6.0
-matplotlib == 2.0.0
-mir_eval == 0.4
-museval == 0.2.0
-musdb == 0.2.3
-numpy == 1.13.0
-pyyaml == 3.12
-scipy == 0.19.0
-six == 1.10.0
-setuptools == 36.0.1
-scikit-learn == 0.19.1
-vamp == 1.1.0
+audioread >= 2.1.4
+jsonpickle >= 0.9.5
+librosa >= 0.6.0
+matplotlib >= 2.0.0
+mir_eval >= 0.4
+museval >= 0.2.0
+musdb >= 0.2.3
+numpy >= 1.13.0
+pyyaml >= 3.12
+scipy >= 0.19.0
+six >= 1.10.0
+setuptools >= 36.0.1
+scikit-learn >= 0.19.1
+vamp >= 1.1.0
