Merge pull request #8 from marnas/feature/cross-account-support

Role assumption readapted & AWS Profile removed

removed empty function

cross-account restore implemented

svc session implemented for s3 upload

cross accounts support implemented

short flagset fixed

aws profile no longer mandatory & default values initialised

flags implemented for accounts, roles and aws profile

add docker release

Merge pull request #7 from marnas/feature/force-restore

force-restore flag implemented

Merge pull request #6 from marnas/quickfix/restore

cross region restore fixed

minor change in variables name