Modernize Travis configuration

.travis.yml

@@ -1,21 +1,13 @@
-language: cpp
-compiler: 
-    - clang
+language: julia
+os:
+    - osx
+    - linux
+julia:
+    - release
+    - nightly
 notifications:
     email: false
-env:
-    matrix: 
-        - 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
 script:
-    - julia -e 'Pkg.init(); run(`ln -s $(pwd()) $(Pkg.dir())/ODE`); Pkg.pin("ODE"); Pkg.resolve()'
-    - julia -e 'using ODE; @assert isdefined(:ODE); @assert typeof(ODE) === Module'
-    - if [ $JULIAVERSION = "julianightlies" ]; then julia --code-coverage test/runtests.jl; fi
-    - if [ $JULIAVERSION = "juliareleases" ]; then julia test/runtests.jl; fi
-after_success:
-    - if [ $JULIAVERSION = "julianightlies" ]; then julia -e 'cd(Pkg.dir("ODE")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'; fi
+    - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
+    - julia -e 'Pkg.clone(pwd()); Pkg.build("ODE"); Pkg.test("ODE"; coverage=true)';
+    - julia -e 'cd(Pkg.dir("ODE")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())';