Merge branch 'master' into devel/pty
Reverting the disable signals change
Merge pull request #322 from mininet/devel/pty

Attach a pty to each node's bash process
testing link stuff
removed many of the commands being run to maximize startup performance
removed comments and cleaned up code.
few small fixes to syntax errors
adding old changes
fixed issue with regex matching
Merge branch 'devel/startup' of github.com:cdburkard/mininet into devel/startup