change Dockerfile for v2.0

data/docker/Dockerfile.partons

@@ -2,7 +2,7 @@
 FROM debian:stretch
 
 # PARTONS version
-ENV PARTONSTAG="v1.0"
+ENV PARTONSTAG="v2.0"
 
 # set WORKSPACE env. variable
 ENV WORKSPACE="/root/workspace"
@@ -14,7 +14,7 @@ WORKDIR ${WORKSPACE}
 # install cmake, build and runtime libraries
 RUN apt-get update && \ 
     apt-get install -y --no-install-recommends git && \
-    apt-get install -y --no-install-recommends cmake build-essential libeigen3-dev libcln-dev libsfml-dev libqt4-dev libqt4-sql-mysql && \ 
+    apt-get install -y --no-install-recommends cmake build-essential libeigen3-dev libcln-dev libsfml-dev libqt4-dev libqt4-sql-mysql libgsl-dev && \ 
     apt-get clean && \
     apt-get autoclean && \
     rm -rf /var/lib/apt/lists/*