WIP: use md5sum for ubuntu

Author: IgorMinar

.travis.yml

@@ -45,7 +45,8 @@ install:
   # Log HTTP requests
   - npm config set loglevel http
   - npm install -g npm@2.5
-  - if [[  `md5 -q npm-shrinkwrap.json` == `md5 -q node_modules/npm-shrinkwrap.ng-hack.json` ]]; then echo "shrinkwrap changed. blowing away node_modules"; rm -rf node_modules; fi
+  - md5sum npm-shrinkwrap.json
+  - if [[  `md5sum npm-shrinkwrap.json` == `md5sum node_modules/npm-shrinkwrap.ng-hack.json` ]]; then echo "shrinkwrap changed. blowing away node_modules"; rm -rf node_modules; fi
   - time npm install
   - cp npm-shrinkwrap.json node_modules/npm-shrinkwrap.ng-hack.json