Adding NAT class
Includes automatic NAT feature (mn --nat) and addNAT convenience method for topologies
fixes #111
Adding NAT class
Includes automatic NAT feature (mn --nat) and addNAT convenience method for topologies
fixes #111
undoing gateway in net and removing addNAT helpers
adding internet / nat example
more NAT cleanup of net and topo
fixing --nat option in mn
small fixes for NAT
mnexec: mount sysfs in each container

The sysfs filesystem is [tagged][1] with a set of namespaces when mounted, taken
from the mounting process. Among other things, this controls which network
devices will show up in /sys/class/net and /sys/class/net/bonding_masters.

Without this change, mininet will not mount sysfs in a node. Attempting to
configure a bond interface in a node will only affect the parent namespace.

This change mounts a new sysfs filesystem in each node. To prevent this mount
from affecting the parent namespace the mount namespace is also unshared.

[1]: https://www.kernel.org/doc/Documentation/filesystems/sysfs-tagging.txt
Do not resolve addresses
Uploading MiniEdit 2.1.0.7.1

Many changes since master version.
- save/load topologies
- host, controller, switch and link properties
- link actions to set status up/down
Add support for batch shutdown of OVS switches.

This saves about 10 seconds for a 200 switch network.
Fix default of in-band control for OVS.
fixes #279
Update to 2.1.0.8
Remove Ubuntu 10 and Debian Lenny and add Debian Wheezy support
    Change the installation to a separate option as recommended with -V.
    This argument expect a parameter which is the version number of OVS you wish to install.
    install.sh -V 2.0.0

    What is nice that I tested, is that you can keep running the above to change
    which OVS version you want to test with.  Also, if a new version of OVS
    is released, just run the above again specifying the new version number.

    The version number must match the version number in the tarball file name
    like openvswitch-2.0.0.tar.gz.  In this case, the version specified
    must be 2.0.0.
Fix IVS build
assertTrue( a > b ) -> assertGreater( a, b ) for better messages
Enable batch shutdown for OVS.
Use a single ovs-vsctl command for speed/atomicity
Update to 2.1.0.8.1.  Include a fix to work around Mininet version number
checking with non-numeric characters.