jQuery dependency changed to >=1.7.0

to not clash with project that need jQuery 2.
1.7.0 selected so that .on and .off are present.
Otherwise AFAICT Amber does not use any new jQuery features,
but feel free to put higher number there if needed.

bower.json

@@ -13,7 +13,7 @@
     "tests"
   ],
   "dependencies": {
-    "jquery": "~1.10.2",
+    "jquery": ">=1.7.0",
     "jquery-ui": "~1.10.3",
     "bootstrap2.3.2": "~2.3.2",
     "jquery-tabby": "git://github.com/alanhogan/Tabby",