add 'p7zip-full' to dependencies

docker/Dockerfile

@@ -3,7 +3,7 @@ MAINTAINER hej@c3pb.de
 
 RUN apt-get update && apt-get install -y \
     build-essential \
-    git python wget gawk subversion unzip \
+    git python wget gawk subversion p7zip-full unzip \
     faketime libfaketime libgmp-dev libmpfr-dev libmpc-dev \
     zlib1g-dev ncurses-dev