fix typo in slurm cancel state

slurm calls it CANCELLED not CANCELED
use sacct if scontrol couldnt find the job

when a job has been in COMPLETED state for longer than a certain ammount of time,
slurm does not display it in the output of scontrol anymore. Instead it complains:
    slurm_load_jobs error: Invalid job id specified

When this happens, fallback to using sacct which has access to the full history.
SGE adaptor's list() did only return the first job id, added loop over all lines
Merge pull request #324 from peay/devel

SGE adaptor's list() did only return the first job id
kudos to MS
a fix especially for Mark :)
more Mark specific fixes...
attributes with default values are "existing", and are thus listed
fix #329
expand example
"Fix" core magic for pbs adaptor on Archer.
(In the previous incarnation it would allocate 24 times too many cores :-)

This adaptor needs serious refactoring!
updated curl URL for mandelbrot examples
added download option for tutorial scripts
fixed markup
emergency fix
Merge branch 'master' of github.com:radical-cybertools/saga-python
fixed mandelbrot bootstrapper
fixedifix
Merge branch 'master' of github.com:radical-cybertools/saga-python
Merge branch 'devel' of github.com-oleweidner:radical-cybertools/saga-python into devel