Merge pull request #313 from cclauss/patch-3

Run free Travis CI and flake8 tests on all new code submissions

.travis.yml

@@ -0,0 +1,22 @@
+group: travis_latest
+language: python
+cache: pip
+matrix:
+  include:
+    - python: 3.7
+      dist: xenial    # required for Python 3.7 (travis-ci/travis-ci#9069)
+      sudo: required  # required for Python 3.7 (travis-ci/travis-ci#9069)
+install:
+  - pip install --upgrade pip
+  - pip install -r requirements.txt
+  - pip install flake8
+before_script:
+  # stop the build if there are Python syntax errors or undefined names
+  - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
+  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
+  - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+script:
+  - true  # add other tests here
+notifications:
+  on_success: change
+  on_failure: change  # `always` will be the setting once code changes slow down

README.md

@@ -1,6 +1,9 @@
 # Manim
 Animation engine for explanatory math videos.
 
+[![build](https://img.shields.io/travis/3b1b/manim.svg "Travis build status")](https://travis-ci.com/3b1b/manim)
+
+
 For those who want to play around with this tool, I should be upfront that I've mostly had my own use cases (i.e. 3b1b videos) in mind while building it, and it might not be the most friendly thing to get up and running.  In particular, I have not done a great job tracking requirements, writing
 tests, and documentation, to put it euphemistically, almost exclusively takes the form of naming conventions.