Simplify travis config due to Pkg2

.travis.yml

@@ -7,12 +7,8 @@ before_install:
  - sudo add-apt-repository ppa:staticfloat/julia-deps -y
  - sudo add-apt-repository ppa:staticfloat/julianightlies -y
  - sudo apt-get update -qq -y
- - sudo apt-get upgrade -y
- - sudo apt-get install julia -y
- - git config --global user.name "Travis User"
- - git config --global user.email "[email protected]"
+ - sudo apt-get install libpcre3-dev julia -y
 script:
- - julia -e "Pkg.init()"
- - mkdir -p ~/.julia/JSON
- - cp -R ./* ~/.julia/JSON/
- - julia ~/.julia/JSON/test/JSON.jl
+ - julia -e 'Pkg.init(); run(`ln -s $(pwd()) $(Pkg.dir())/JSON`); Pkg.resolve()'
+ - julia -e 'using JSON; @assert isdefined(:JSON); @assert typeof(JSON) === Module'
+ - julia test/JSON.jl