0.4.0-rc1 released

Change log:

arcstorage-ui:

Added command line arguments for opening an url.
Fixed high CPU usage in transfer thread.
Fixed many smaller stability issues.

arcsub-ui:

Most functionality implemented.
Can handle per-job files and substitution parameters in filenames.
Preview of run-scripts and xrsl added.

arcstat-ui:

Download of job now implemented.
Can open arcstorage-ui for inspecting a session directory of a job.