Add Travis test script

Author: jiahao

.travis.yml

@@ -0,0 +1,22 @@
+language: cpp
+compiler:
+  - clang
+notifications:
+  email: false
+env:
+    - JULIAVERSION="juliareleases" 
+    - JULIAVERSION="julianightlies" 
+before_install:
+    - sudo add-apt-repository ppa:staticfloat/julia-deps -y
+    - sudo add-apt-repository ppa:staticfloat/${JULIAVERSION} -y
+    - sudo apt-get update -qq -y
+    - sudo apt-get install libpcre3-dev julia -y
+    - git config --global user.name "Travis User"
+    - git config --global user.email "[email protected]"
+    - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
+script:
+    - julia -e 'Pkg.init(); Pkg.clone(pwd())'
+    - julia -e 'Pkg.test("Combinatorics", coverage=true)'
+after_success:
+    - julia -e 'cd(Pkg.dir("Combinatorics")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
+