Added support for mount namespaces in bind.py. Also moved it to the node class as a host type.
Merge branch 'patches/fix_bindpy' of https://github.com/cdburkard/mininet into patches/fix_bindpy
added persistence option to HostWithPrivateDirs. also attached mount namespaces when mnexec -a is specified
mountprivatedirs is no longer needed
added documentation for HostWithPrivateDirs
use a single mininet instance in bindpy
conforming to mininet style
Merge pull request #315 from cdburkard/patches/fix_bindpy

Added support for mount namespaces in bind.py