fix npm install and travis build by setting karma version

.travis.yml

@@ -2,10 +2,14 @@ language: node_js
 node_js:
   - "0.10"
 
+# Karma requires a specific version due to dependency issues.
+before_install:
+  - npm install --quiet -g [email protected]
+
 before_script:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
-  - npm install --quiet -g grunt-cli karma bower
+  - npm install --quiet -g grunt-cli bower
   - bower install
 
 script: grunt

README.md

@@ -8,7 +8,10 @@ The AngularJS client for the bioacoustic workbench
 ## Install instructions
 	$ npm -g install grunt-cli karma bower
 
-cd to your cloned directory and then
+cd to your cloned directory and then install `npm` and `bower` modules.
+Karma requires a specific version due to dependency issues.
+
+    $ npm install --quiet -g [email protected]
 
 	$ npm install