Add dockerfile

[Meteorix]

You can use docker to build pyflame

sudo docker build --tag pyflame .
sudo docker run -it -v $(pwd):/root/pyflame pyflame /bin/bash -c "cd /root/pyflame;./autogen.sh;./configure;make"

This will also produce the executable at src/pyflame, which support py2.6/2.7/3.4/3.5/3.6