reorg Dockerfile to fasten the build phase
add JAVA_HOME check
reorg Makefile to make it compliant with the make & make install convention
fix dockerfile paths
fixes makefile
Fix apt-get update in Dockerfile
Merge branch 'master' of https://github.com/simonmazas/vocker into simonmazas-master

Conflicts:
	Makefile
	src/docker/Dockerfile
Merge branch 'simonmazas-master'