builder/amazon/instance: boilerplate
builder/amazon/common: AccessConfig for standard access config
builder/amazon/common: RunConfig for launch info
builder/amazon/ebs: validate access config
builder/common: common config struct for Packer configs
builder/amazon/common: tests for runconfig
builder/amazon/*: clean up tests
fmt
builder/amazon: extract StepKeyPair for both
builder/amazon: extract StepSecurityGroup
builder/amazon/common: panic if SSHPot is 0
builder/amazon: extract StepRunSourceInstance
builder/amazon: extract SSH connect funcs
builder/amazon: provision on instance
builder/amazon/common: extract Artifact
fmt