Merge pull request #27 from rande/fix_node_package_version

fix(npm): improve support for invalid version in package url

Author: rande

.travis.yml

@@ -8,8 +8,10 @@ cache:
 
 install:
     # from http://austinpray.com/ops/2015/09/20/change-travis-node-version.html
+    - make install-backend
     - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh && nvm install 4.4.5
-    - make install
+    - npm -g install yarn
+    - make install-frontend
 
 script:
     - go get github.com/mattn/goveralls

Makefile

@@ -63,7 +63,7 @@ install-backend:  ## Install backend dependencies
 	glide install
 
 install-frontend:  ## Install frontend dependencies
-	cd gui && npm install
+	cd gui && yarn --no-progress
 
 update:  ## Update dependencies
 	glide update