Completed RelativePath implementation.
Merge branch 'develop' of ssh://github.com/NLeSC/octopus into develop
Added copy constructor to RelativePath. 
Added constructor to AbsolutePathImplementation that accepts multiple
RelativePaths.
Ssh credentials work again.
Merge remote-tracking branch 'origin/develop' into feature/ssh-adaptor-3
Partially implementation of LocalAdaptor.
Renamed credential implementations.
Merge remote-tracking branch 'origin/develop' into feature/ssh-adaptor-3
Switched default entry point of local file system to user.home.
merge
Merge remote-tracking branch 'origin/develop' into feature/ssh-adaptor-3
Added unit test for JobsEngine.submitJob.

Added integration test which uses local job and files.
Merge remote-tracking branch 'origin/develop' into feature/test_sandbox_submit_status
Fixed local FileSystem creation. 
Fixed local createDirectory.
Merge remote-tracking branch 'origin/develop' into feature/test_sandbox_submit_status
Fixed local scheduler URI acception.
Merge remote-tracking branch 'origin/develop' into feature/test_sandbox_submit_status
Merge remote-tracking branch 'origin/develop' into feature/test_sandbox_submit_status
Fixed OctopusProperties to check if a key exists.
Local jobs adaptor needs 'local:///' as location.