* deprecate AWS S3 SDKver1 Adapter
* add UrlAware Interface for Adapter
* add ctime(), atime(), contentType(), append(), downloadFile()
* change download/upload to pull/push
* optimize keys() ($prefix, $withDirectoryFlag)
* add uri-handling (bnrepo://REPONAME/KEY) for Linker and generation in repo
* add tests for new functions