add travis file

Author: OkonSamuel

.travis.yml

@@ -0,0 +1,16 @@
+# Documentation: http://docs.travis-ci.com/user/languages/julia/
+language: julia
+os:
+  - linux
+julia:
+  - 1.0
+  - 1.5
+  - nightly
+matrix:
+  allow_failures:
+    - julia: nightly
+notifications:
+  email: false
+after_success:
+  # push coverage results to Codecov
+  - julia -e 'using Pkg; pkg"add Coverage"; using Coverage; Codecov.submit(Codecov.process_folder())'