If failed lookups are fatal, re-raise the exception

Fixes #1938.
proper bin path now called
Merge pull request #1939 from diefans/devel

proper bin path now called
Fix get_url to work on Python 2.4
Only inventory "running" EC2 instances. "stopped" is also a valid state and these should not be inventoried.
Merge pull request #1946 from tgerla/devel

Only inventory "running" EC2 instances. "stopped" is also a valid state ...
Merge remote-tracking branch 'upstream/devel' into devel