closes #163
Merge branch 'master' into devel

Conflicts:
	saga/VERSION
	saga/utils/pty_shell_factory.py
updated changelog
fix #215
Merge branch 'devel' of github.com:saga-project/saga-python into devel
improved PBS directory handling and logging
Merge branch 'devel' of github.com-oleweidner:saga-project/saga-python into devel
small fix for PBS workdir handling
good suggestion from Andre to use abspath
implemented memory reqs for SGE
removed mem stuff from example