fixed getInstance not passing some params it was given.
Merge pull request #222 from unwin/develop

fixed getInstance not passing some params it was given.
Added support for virtual machine groups
Fix Typo in HealthChecks

Paramters passed in the wrong way around.
Merge pull request #227 from andylyall/develop

Fix Typo in HealthChecks
WIP: Spot Instances rework
Checkstyle fixes
Spot VMs re-work cont: floats for prices are back for consistency with the rest of the API.
Merge pull request #228 from maksimov/develop

Spot VMs
Getters for time interval in filter
Adding timestamps to the matcher.
:bangbang: Added the spot vms capability, driver fixes to follow.
Changes to support RDS for GCE
Adding missing getters and annotations
Merge pull request #231 from maksimov/develop

Adding SpotPrice timestamps filtering
WIP: Spot Instances rework
Checkstyle fixes
Spot VMs re-work cont: floats for prices are back for consistency with the rest of the API.
Added abstract methods

Added some missing abstract methods for VLANSUpport
Merge Fixes