updated readme
updated readme

dreal-deps/easyloggingpp,chenmusun/easyloggingpp,lisong521/easyloggingpp,arvidsson/easyloggingpp,chenmusun/easyloggingpp,spthaolt/easyloggingpp,dreal-deps/easyloggingpp,simonhang/easyloggingpp,blankme/easyloggingpp,spqr33/easyloggingpp,dreal-deps/easyloggingpp,spqr33/easyloggingpp,lisong521/easyloggingpp,blankme/easyloggingpp,blankme/easyloggingpp,utiasASRL/easyloggingpp,spthaolt/easyloggingpp,hellowshinobu/easyloggingpp,utiasASRL/easyloggingpp,simonhang/easyloggingpp,simonhang/easyloggingpp,arvidsson/easyloggingpp,hellowshinobu/easyloggingpp,lisong521/easyloggingpp,arvidsson/easyloggingpp,spqr33/easyloggingpp,hellowshinobu/easyloggingpp,utiasASRL/easyloggingpp,chenmusun/easyloggingpp,spthaolt/easyloggingpp