build instructions without Eigen
build instructions without Eigen


Former-commit-id: 0dc42319fead52255994662600d2136892a96b33
shuheik/dynet,shuheik/dynet,clab/dynet,chunyang-wen/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet,clab/cnn,danielhers/dynet,clab/dynet,xunzhang/dynet,shuheik/dynet,danielhers/dynet,clab/cnn,xunzhang/dynet,clab/dynet,xunzhang/dynet,clab/cnn,chunyang-wen/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,danielhers/dynet,danielhers/dynet,clab/dynet,clab/dynet,xunzhang/dynet,chunyang-wen/dynet