Fix issues pointed out by @amohammadi

install/from-scratch.sh

@@ -43,12 +43,11 @@ ${CONDA} create --yes -n ${NAME} --override-channels -c conda-forge -c defaults
   libpng \
   libsvm \
   libtiff \
-  matplotlib \
+  matplotlib=1 \
   nose \
   numexpr \
   numpy \
   opencv \
-  pathlib \
   pillow \
   pip \
   pkg-config \
@@ -76,7 +75,7 @@ else
 fi
 
 pip --no-cache-dir install \
-  menpo \
+  menpo==0.7.5 \
   menpofit \
   schema \
   pyedflib \