fix capitalization, update authors in package.json

bower.json

 {
   "name": "mail",
   "version": "0.5.3",
-  "description": "Mail App",
+  "description": "Mail app",
   "main": "mail.js",
   "license": "AGPLv3",
   "homepage": "https://github.com/owncloud/mail",

package.json

 {
   "name": "mail",
   "version": "0.5.3",
-  "description": "Mail App",
+  "description": "Mail app",
   "main": "index.js",
   "directories": {
     "test": "tests"
@@ -17,7 +17,7 @@
   "keywords": [
     "mail"
   ],
-  "author": "Thomas Müller and others",
+  "author": "Christoph Wurst, Thomas Müller, Jan-Christoph Borchardt, Steffen Lindner and many more …",
   "license": "AGPL-3.0",
   "bugs": {
     "url": "https://github.com/owncloud/mail/issues"

tests/phpunit.xml

@@ -5,7 +5,7 @@
 		 timeoutForMediumTests="900"
 		 timeoutForLargeTests="900"
 		>
-	<testsuite name='Mail App Tests'>
+	<testsuite name='Mail app tests'>
 		<directory suffix='test.php'>.</directory>
 	</testsuite>
 	<!-- filters for code coverage -->