v1.1.1: Merge pull request #44 from gquemener/bugfix/stderr

Rely on last command exit status to raise error

v1.1.0: Merge pull request #36 from rkmax/master

follow the same behavior than console ssh client about config file

v1.0.1: Merge pull request #33 from cmuench/master

[BUGFIX] Added support for .ssh/config files indented with tabs or spaces