Set up mocha, chai and karma for sheriff-o-matic unit testing.

Tools/GardeningServer/README-mocha

+sheriff-o-matic must be run from a server in order to handle Polymer imports correctly.
+
+1. cd Tools
+2. python -m SimpleHTTPServer
+3. Load http://localhost:8000/GardeningServer/sheriff-o-matic.html
+
+Run the tests via http://localhost:8000/GardeningServer/test/run-unit-tests.html.
+
+From the command line:
+1. cd Tools/GardeningServer
+2. ./node_modules/karma/bin/karma start
+
+This will run the unit tests in Chrome, pipe the results to the command line, and watch the source and test files for changes. With 'npm install -g karma-cli', you can just use 'karma start'. To run once and exit, use 'karma start --single-run'.
+
+Dependencies, including Polymer and mocha, must be synced via bower in order for anything to work.
+

[ojan, 2014/07/23 01:36:57]

Maybe add a section to the readme explaining what chai/mocha/karma/sugar are and
do? Just a one-sentence description for each is enough.

[michaelpg, 2014/07/23 02:12:01]

This is more of a replacement readme for when we switch over testing. I'm ok
with shortening the descriptions if there is a better place to put this
documentation so it's accessible.

[ojan, 2014/07/23 02:38:37]

I think you misunderstood me. I was asking for *more* description, not less.

[michaelpg, 2014/07/23 03:06:42]

Oh, yeah, sorry. I thought you were saying edit the existing README instead.
Will do.

[michaelpg, 2014/07/28 20:35:04]

Done.

+INSTALLING NPM/BOWER
+The version of npm in apt-get is too old for bower. Instead
+install it from http://nodejs.org/download/.
+
+Install bower with:
+    sudo npm install -g bower
+
+SYNCING DEPENDENCIES
+1. cd Tools/GardeningServer
+2. bower update
+3. npm install