Travis: Fails on Karma/WS install.

[ryan-roemer]

> ws@0.4.32 install /home/travis/build/FormidableLabs/notes/skeleton/browserify/node_modules/karma/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws
> (node-gyp rebuild 2> builderror.log) || (exit 0)

make: Entering directory `/home/travis/build/FormidableLabs/notes/skeleton/browserify/node_modules/karma/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/build'
  CXX(target) Release/obj.target/bufferutil/src/bufferutil.o
  SOLINK_MODULE(target) Release/obj.target/bufferutil.node
  SOLINK_MODULE(target) Release/obj.target/bufferutil.node: Finished
  COPY Release/bufferutil.node
  CXX(target) Release/obj.target/validation/src/validation.o
  SOLINK_MODULE(target) Release/obj.target/validation.node
  SOLINK_MODULE(target) Release/obj.target/validation.node: Finished
  COPY Release/validation.node
make: Leaving directory `/home/travis/build/FormidableLabs/notes/skeleton/browserify/node_modules/karma/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/build'
�[37m�[40mnpm�[0m �[0m�[31m�[40mERR!�[0m�[35m�[0m cb() never called!
�[0m�[37m�[40mnpm�[0m �[0m�[31m�[40mERR!�[0m �[0m�[35mnot ok�[0m code 0
�[0mtravis_time:end:250fae50:start=1411921886951714571,finish=1411921992172173634,duration=105220459063
�[0K
�[31;1mThe command "npm install" failed and exited with 1 during .�[0m