Im

* Minor bug fixes and code improvements
* Add Docker connector
* Add Google Compute Engine (GCE) connector
* Bugfixes in OCCI connector
* Improve EC2 connector
* Improve OpenNebula connector to support version 4.8
* Change GetVMInfo and AlterVM functions to return only RADL data
* Add GetVMProperty function to the API
* Add provider information in the RADL
* Bug fixes in LibVirt connector
* Change Ansible version to 1.7.2
* Use the ssh connector with the pipelining option in ansible to improve preformace in the contextualization step

* Minor bug fixes
* Improve contextualization code
* Enable to change the credentials of the VMI user
* Change Ansible version to 1.7.1
* Improve LibCloud connector
* Modify setup to use in pip

* Solve some concurrency bug fixes
* Add launch_time info to the EC2 VMs

* Support to application requirements in the Recipes D.B.
* Minor bug fixes
* Change Ansible version to 1.6.6
* Add internal ID to VMs

* Change OCCI connector to be OCCI 1.1 compliant
* Minor bug fixes in InfrastructureManager
* Minor bug fixes in OpenNebula connector
* Minor changes in SSH module
* Use Ansible Galaxy to install remote roles

* Important internal code modifications