installing rar and unrar to be able to execute simple scripts in the container. ref issue #75

Dockerfile

@@ -11,9 +11,11 @@ VOLUME /config
 # Update packages and install software
 RUN apt-get update \
     && apt-get -y install software-properties-common \
+    && add-apt-repository multiverse \
     && add-apt-repository ppa:transmissionbt/ppa \
     && apt-get update \
-    && apt-get install -y transmission-cli transmission-common transmission-daemon openvpn curl \
+    && apt-get install -y transmission-cli transmission-common transmission-daemon \
+    && apt-get install -y openvpn curl rar unrar \
     && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
     && curl -L https://github.com/jwilder/dockerize/releases/download/v0.0.2/dockerize-linux-amd64-v0.0.2.tar.gz | tar -C /usr/local/bin -xzv