Added alpha releas comments, inc. do not distribute yet.

Added install notes for install.sh.

These may not be needed if they are pushed upstream.

This reverts commit 07aad110.

When the semantics are clear, functionality like this will get added back to
Mininet.

Conflicts:

	mininet/node.py

Controllers are no longer namespace-able, and all calls need one fewer
arg.

Also use more sensible temporary variable name.

Works around bug in newer version of kernel-package.

Thanks to Ben Pfaff who wrote the patch

Now, the majority the install can be done with one line, but the other
to each part of the install is still available.

Also fix a few bugs and add Wireshark coloring rules.

We should check NOXController and RemoteController to make sure that
they are not broken, but I cannot do this at the moment.

Also rearranged parameters in link command to

mininet> link s1 h2 up

To resemble ifconfig a bit more.