Bug fixes, que selection, MATLAB shortcuts

- Added support for the 'Que' option in WGexec so that worker jobs can be
executed on a different que than the spawning one.
- Added support for recovering from failure (i.e. WGgetResults with
'LocalFolder') on UNIX machines
- Added gridInvoke.cmd, simpleInvoke, simpleInvoke.cmd used as MATLAB &
Putty shortcuts (this is not fully supported yet and might be in future
versions).
- Grid jobs are now local in that 2 or more can be running simultaneously.
Out files and data files are now no longer collectively deleted but instead
they use the job name.
- WeizGrid now uses MATLAB 2013a