Revert "Make jQuery 2.0 the minimum supported version."

This partially reverts commit 9eded912a0.

Gruntfile.js

@@ -63,8 +63,8 @@ module.exports = function (grunt) {
                  '}\n',
     jqueryVersionCheck: '+function ($) {\n' +
                         '  var version = $.fn.jquery.split(\' \')[0].split(\'.\')\n' +
-                        '  if (version[0] !== \'2\') {\n' +
-                        '    throw new Error(\'Bootstrap\\\'s JavaScript requires jQuery version 2.x.x\')\n' +
+                        '  if ((version[0] < 2 && version[1] < 9) || (version[0] == 1 && version[1] == 9 && version[2] < 1)) {\n' +
+                        '    throw new Error(\'Bootstrap\\\'s JavaScript requires jQuery version 1.9.1 or higher\')\n' +
                         '  }\n' +
                         '}(jQuery);\n\n',
 

bower.json

@@ -29,6 +29,6 @@
     "test-infra"
   ],
   "dependencies": {
-    "jquery": "2"
+    "jquery": "1.9.1 - 2"
   }
 }