Add ddpg support
- Update the version to 0.3.2-SNAPSHOT
- Rename parameter action_selection to strategy
- Add new parameters for DDPG (see README)
- Change Common-monticar version to 0.0.17-SNAPSHOT, because version 0.0.17-20180824.094114-1 seems to be non-existent
Edited by Nicola Gatto