add Vishal's master-worker code
Merge branch 'devel' into feature/master-worker
added README for Master/Worker example
Merge branch 'devel' into feature/master-worker
Merge branch 'devel' into feature/master-worker
Merge branch 'devel' into feature/master-worker
convert an error message into a more appropriate debug log entry
fir tcsh prompt aggression
get_exit_code in the shell adaptor now returns None if no exit code is available (instead of raising an exception)

This closes #350
remove an error check which screwed with proper error reporting
use "file://" as default schema
add some default settings
add some default settings
implement file connection cache

this needs the new release manager in radical.utils, devel branch
move a method around
increase PBS job state delay; more shell leasing
fix typo, guard against threashing on pbs monitor errors
merge
Merge branch 'devel' of github.com:radical-cybertools/saga-python into devel
snapshot