Remove "Research projects using Chainer" from README
Remove "Research projects using Chainer" from README

hvy/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,wkentaro/chainer,niboshi/chainer,pfnet/chainer,niboshi/chainer,chainer/chainer,chainer/chainer,okuta/chainer,niboshi/chainer,wkentaro/chainer,wkentaro/chainer,hvy/chainer,chainer/chainer,okuta/chainer,chainer/chainer,okuta/chainer,hvy/chainer,okuta/chainer