Added config for Travis CI, and adapted README.md

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Reduce test matrix to main versions of Python

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Restrict testing to Python 2.7

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Show build status directly under the title, without text

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Merge pull request #158 from smarr/tobami-master

Add configuration for Travis CI