Merge pull request #1 from chris-zen/fix-sge-empty-env

Fix #187: malformed qsub script when environment has an empty dictionary
Merge remote-tracking branch 'upstream/devel' into devel
Merge branch 'devel' of github.com:chris-zen/saga-python into fix-retrieve-job
Merge branch 'devel' of github.com:chris-zen/saga-python into devel
Merge branch 'devel' of https://github.com/saga-project/saga-python into devel
Merge branch 'devel' into fix-retrieve-job
SGE adapter uses qacct to retrieve information about finished/failed jobs
Merge branch 'devel' of https://github.com/saga-project/saga-python into devel
Merge branch 'devel' into fix-retrieve-job
Fix _retrieve_job returning None
Removed the shell wrapper
Merge branch 'devel' of https://github.com/saga-project/saga-python into fix-retrieve-job
Added read() and write() functions; Fixed bug in is_file(); Added -f flag to remove_self()
Merge branch 'devel' of https://github.com/saga-project/saga-python into fix-retrieve-job
IBM LoadLeveler adaptor
remove cluster string
Merge remote-tracking branch 'upstream/devel' into fix-retrieve-job
Added doc string to read() and write() calls
Added close() method
Added close() method, Added remove_self() method