Update require.js to 2.1.11
updated jquery.infinitescroll to 2.0b2.120519

previous one on cdnjs is quite buggy on detecting
end of element scroll
Merge pull request #2789 from kmontag/require-js-2.1.11

Update require.js to 2.1.11
Merge pull request #2791 from mihneasim/master

updated jquery.infinitescroll to 2.0b2.120519