importlib is Python 2.7 only.

Is Python 2.x only. Not supported under Python 3.x.

Pull out firewall methods code into seperate files.

Fix problems starting with method=='auto'; we were making decisions
based on the method, before the method had been finalized by the
firewall.

Only very basic testing so far. What could go wrong?

Was broken by passing environment variable PYTHONPATH to process. Will
fix this if there is a use case for it.

* Make compatible with setuptools.
* Load modules via ssh into separate modules, not the one name space.

Import resolvconf_nameservers, fix wrong types

Add resolvconf_nameservers to the list of functions imported from
helpers.
Fixed an instance where the method client.main was being called with
ns_hosts (string obtained from optional argument --ns-hosts) instead of
nslist (list of tuples that was already being passed to other methods).
Should fix issue #24.

dns: Added --ns-hosts to tunnel only some requests

By default, the --dns flag configures the firewall to only intercept
queries made to the nameservers defined in resolvconf. This flag enables
the user to explicitly specify the nameservers which queries will be
redirected. This can be useful when the local nameserver forwards
queries to some domains to a nameserver on the remote site of the
tunnel.

Remove no-latency-control assertion

Remove an assertion that would fail when --no-latency-control is set.

Update ui-macos sources.list with new icon names

I looks like building the app UI for OS X has been broken since
https://github.com/sshuttle/sshuttle/commit/9eced8d0494e8d44b28db21f5643d824710c07a1
due to the sources.list.do file still referencing the old .png images.

Without this fix the build will stop at:

    do            chicken-tiny.png
    do: Users/elasticdog/sshuttle/src/ui-macos/chicken-tiny.png: no .do file
    do:         Sshuttle VPN.app: got exit code 1
    do:       Sshuttle VPN.app.zip: got exit code 1
    do:     dist: got exit code 1
    do:   ui-macos/all: got exit code 1
    do: all: got exit code 1

Don't redirect excluded subsets of included subnets

Switched the ./sshuttle to src/sshuttle

Fixed issue #12

family should be an integer. fixed parsing routes

Fix the excludes rule for OS X Yosemite and OS X El Captain

Without this fix, the rdr rule is executed sending the packages that
should be excluded to the ssh tunnel.

What I did was make sure that the packages that are going to the
excluded subnets are processed first and only after that, the remaining
packages will be sent to the ssh tunnel.

Thanks Warr1024 on #openssh channel in freenode for telling me about
the quick keyword and the rest of guys in the channel who tried to help.

Check for fileno attribute in _tty_width function

When using Options parser within a unittest.TextTestRunner with buffering enabled (buffer=True), it fails with: 
AttributeError: StringIO instance has no attribute 'fileno'

This change will prevent this kind of error.

Make firewall.py use the right params for islocal

Patch/osx improvements

This icons are using scale independent PDF template images which make menu item
icon look great on both Yosemite light & dark theme. Also adding new flatter
and higher resolution app icon.

This ensures application is not leaving empty status item.

Importing everything (*) from AppKit takes a while, since we got 3 scripts
doing that, startup could take up to few seconds. This change makes script
import only what they need, improving startup time to fraction of second.