Merge Karma into one contract

+ Update README contract addresses to reflect new upgradeable version on ropsten
+ Remove functions added to Karma that I was using to test the upgrade process
+ Add test for deploying Karma proxy successfully

test/Karma.proxy.test.js

@@ -0,0 +1,15 @@
+// Load dependencies
+const { expect } = require('chai');
+const { deployProxy, upgradeProxy} = require('@openzeppelin/truffle-upgrades');
+
+// Load compiled artifacts
+const Karma = artifacts.require('Karma');
+
+// Start test block
+contract('Karma (proxy)', function () {
+    // Test case
+    it('Karma deploys successfully', async function () {
+        // Increment
+        const karma = await Karma.new();
+    });
+});