Snapshot 1.4 released

Snapshot 1.4 released. New features include:

* Specifying of local/remote files as atomic GridBean GPE FILE or URL input parameter values in workflow
* Joining of multiple file set/gpe_file/url variables into one atomic GridBean fileset parameter value in workflow
* Executing atomic job in working directory of another atomic job in workflow
* Bugfixes in services
* Bugfixes in clients

The sources are tagged with tag GPE4GTK_1_4.