Enhanced admin services by adding account and billing support classes.
#236
Added listSpotVirtualMachineRequests method call with it's supporting filter options class.
Add VisibleScope to LBs
Add Naming Constraints to VolumeCapabilities
Merge pull request #240 from andylyall/develop

Develop
Added listSpotVirtualMachineRequests method call with it's supporting filter options class.
Merge branch 'develop' of github.com:maksimov/dasein-cloud-core into develop
Added listSpotVirtualMachineRequests method call with it's supporting filter options class.
Merge branch 'develop' of github.com:maksimov/dasein-cloud-core into develop
Add VisibleScope to more resources
Merge pull request #242 from andylyall/develop

Add VisibleScope to more resources
Merge pull request #241 from maksimov/develop

Spot VMs
Merge pull request #237 from dryink/develop

Enhanced admin services by adding account and billing support classes.
try to fix my merge error