Use NPM dependency for PureScript compiler

Author: garyb

.travis.yml

@@ -2,13 +2,7 @@ language: node_js
 dist: trusty
 sudo: required
 node_js: stable
-env:
-  - PATH=$HOME/purescript:$PATH
 install:
-  - TAG=$(wget -q -O - https://github.com/purescript/purescript/releases/latest --server-response --max-redirect 0 2>&1 | sed -n -e 's/.*Location:.*tag\///p')
-  - wget -O $HOME/purescript.tar.gz https://github.com/purescript/purescript/releases/download/$TAG/linux64.tar.gz
-  - tar -xvf $HOME/purescript.tar.gz -C $HOME/
-  - chmod a+x $HOME/purescript
   - npm install -g bower
   - npm install
 script: