fix call signature check spec string typo
its "mkdir -p" all the way down.  Also, test fixes.
another test fix
Merge branch 'devel' of github.com:radical-cybertools/saga-python into devel
prepare release 0.21
fixes #397
preparing 0.22 release
incorporated Danila's changes.
re-introduced marks fixes
removed spurious line
added test config for archer
fix logical error on dir state recovery
add missing error check on mkdir
re-enable test for PBSPro_10, as discussed with Ole.

Ole, this looks ready to merge into devel, IMHO
incorporated Danila's changes.
re-introduced marks fixes
removed spurious line
added test config for archer
re-enable test for PBSPro_10, as discussed with Ole.

Ole, this looks ready to merge into devel, IMHO
Merge branch 'fix/issue392' of github.com-oleweidner:radical-cybertools/saga-python into fix/issue392