Made it non-abstract; added defaults for all introduced keys; added bucketSuffix key;
Removed mentions of the AWSMetadata; made privateResolvers dependent on isPrivate
Changed dependency on sbt-start-script (there is new version for sbt-13)
Removed instance profile key; set versions of (aws-)statika to latest snapshots;
Introduced publishBucketSuffix key (defaults to bucketSuffix)
Removed common aws-statika dependency
Extended readme
Merge branch 'feature/config/non-abstract'