Defining .travis.yml

[mbrasebin]

• Defining the configuration of .travis.yml and makes it work and run and run app.py

[mbrasebin]

Fist version of line, but cannot be tested : https://github.com/IGNF/NeatMap/commit/d025ea68d5ff6c4ee256518ef2b749782a9353f1

[julienperret]

Solved using code from Vincent (https://github.com/julienperret/erc/blob/master/prepare.py).