Configure travis and coverage

Author: marcoesposito1988

.coverage

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+!coverage.py: This is a private format, don't read it directly!{"lines":{"/home/marco/projects/trackingmore/trackingmore/testdata/testdata.py":[1,5,6,7,8,9,10,11,14,15,16,17,18,19,20,23,24,25,26,27,28,29,32,33,34],"/home/marco/projects/trackingmore/trackingmore/__init__.py":[1],"/home/marco/projects/trackingmore/trackingmore/testdata/__init__.py":[1],"/home/marco/projects/trackingmore/trackingmore/trackingmore.py":[1,2,4,8,9,10,11,12,13,14,15,20,85,23,24,25,79,29,97,34,91,37,38,103,109,54,73,59,60],"/home/marco/projects/trackingmore/trackingmore/test_trackingmore.py":[84,1,2,4,17,56,68,7,28,34,93]}}

.coveragerc

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+[run]
+omit = setup.py

.travis.yml

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+language: python
+python:
+  - "3.3"
+  - "3.4"
+  - "3.5"
+  - "3.6"
+  - "3.7-dev"
+  - "pypy3"
+install:
+  - pip install requests pytest
+script:
+  - py.test --cov-report term-missing --cov=trackingmore
+matrix:
+  allow_failures:
+    - python: 3.7-dev
+    - python: pypy3
+branches:
+  only:
+   - master
+after_success:
+    - coveralls
+notifications:
+  email:
+    recipients:
+      - [email protected]
+    on_success: always
+    on_failure: always