Work on deployment targets
#137 The target API needs to be reviewed
#97 Reintroduce the support of Neutron
#95 Do not wait in OpenStack if no Volume to attach and no Floating IP
#52 Support concurrent deployment of Openstack VM
#103: root instances must be associated with the 'target' installer
#101 Signal inexisting components when parsing instance definitions
#110 Check the resolution of component names
JClouds switch
- Initial implementation of a generic JClouds provider
- Complete rewriting of Openstack support based on JClouds
#138 Skip deployment of Karaf artifacts
Improve performances when logging stack traces
Complete Network configuration with Openstack
Update the Karaf packaging for JClouds
Add a common tooling bundle
Merge remote-tracking branch 'roboconf/master'

Conflicts:
	core/roboconf-target-docker/src/main/java/net/roboconf/target/docker/internal/DockerHandler.java
Fix some little things
Maven deployment should work now (workaround)
Delete a useful file and keep the Karaf config in the root POM
Merge pull request #140 from vincent-zurczak/master

JClouds integration + Several fixes