Rename network.BasicInfo as SubnetInfo
Skeleton Subnets method
Comment about maas Subnets
Merge branch 'master' into ec2-subnets
Start collecting subnet info
Merge branch 'subnet-picknewaddress' into ec2-subnets
Calculate AllocatableIPLow for SubnetInfo
Move decimal IP conversion function
Complete implementation of Subnets for ec2
Test IPToDecimal
Test DecimalToIP
Improve way of calculating highest IP
Correct algorithm for working out highest allocatable IP
Basic test for Subnets
Add comment
Merge branch 'master' into ec2-subnets
Action supercommand

Use JUJU_DEV_FEATURE_FLAGS envar with an option for "action" to enable
this supercommand.

For example:

   export JUJU_DEV_FEATURE_FLAGS="${JUJU_DEV_FEATURE_FLAGS}, action"
address feedback on review

 - Test with and without feature flag
 - fixes for feedback trivials
 - don't use custom struct for action supercommand
 - use anonymous struct to serialize JSON
address review from ericsnow
don't include un-implemented commands