Unit testing infrastructure

Implements the beginnings of unit testing infrastructure using
mocha/chai. The unit tests can be run locally using test/runtests.sh,
although this will need tweaks to run on Windows. They should also run
on commit using Travis-CI.

The unit tests themselves live in test/tests. The index.js file
specifies separate test sets, which can be run individually by calling
test/runtests.sh <testsets>. Right now there is only a single unit
test, but hopefully we'll have more soon...

test/components/zotero-unit.js

@@ -0,0 +1,51 @@
+"use strict";
+/*
+    ***** BEGIN LICENSE BLOCK *****
+    
+    Copyright © 2012 Center for History and New Media
+                     George Mason University, Fairfax, Virginia, USA
+                     http://zotero.org
+    
+    This file is part of Zotero.
+    
+    Zotero is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    Zotero is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+    
+    You should have received a copy of the GNU Affero General Public License
+    along with Zotero.  If not, see <http://www.gnu.org/licenses/>.
+    
+    ***** END LICENSE BLOCK *****
+*/
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+function ZoteroUnit() {
+	this.wrappedJSObject = this;
+}
+ZoteroUnit.prototype = {
+	/* nsICommandLineHandler */
+	handle:function(cmdLine) {
+		this.tests = cmdLine.handleFlagWithParam("test", false);
+	},
+
+	dump:function(x) {
+		dump(x);
+	},
+	
+	contractID: "@mozilla.org/commandlinehandler/general-startup;1?type=zotero-unit",
+	classDescription: "Zotero Unit Command Line Handler",
+	classID: Components.ID("{b8570031-be5e-46e8-9785-38cd50a5d911}"),
+	service: true,
+	_xpcom_categories: [{category:"command-line-handler", entry:"m-zotero-unit"}],
+	QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsICommandLineHandler,
+	                                       Components.interfaces.nsISupports])
+};
+
+
+var NSGetFactory = XPCOMUtils.generateNSGetFactory([ZoteroUnit]);