Remove old Travis files

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Make script/test use Docker

Really easy to run entire test suite with Docker now. Also switch
Wercker to use the same script.

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #506 from bfirsh/make-test-script-use-docker

Make script/test use docker
Changing to stable debian (wheezy).

Therefore it compiles agains more common version of GLIBC.

Now works out of the box on Debian wheezy, centos:centos6 and other stable
Of course it works on new distributions. Tested with:
    debian:jessie and
    ubuntu:14.04

Signed-off-by: Alexander Holbreich <alexander@holbreich.org>

Conflicts:
	Dockerfile
Run pyinstaller build as normal user

... and test build on CI so we don't break it again!

Fixes #503

Signed-off-by: Ben Firshman <ben@firshman.co.uk>