Setting version to v0.15.0-SNAPSHOT
Merge tag 'v0.14.1' into release/v0.15.0

amazon-linux-ami v0.14.1

Conflicts:
	version.sbt
* Moved to aws-statika `v1.0.1` (fixing credentials);
* Removed deprecated `AMI44939930`;
* Refined abstract `AmazonLinuxAMI`;
* Added actual AMIs for different regions;
* Added synonims for AWS regions for convenience;
* Simplified AMIs definition: one case class depending on the region;
* moved regions to aws-scala-tools;
* added GovCloud ami;
Updated docs
Setting version to 0.15.0
Merge branch 'release/v0.15.0'