Added UCloud to `powered by mesos` list.
Added UCloud to `powered by mesos` list.

This closes #189

jpeach/mesos,Gilbert88/mesos,reneploetz/mesos,asamerh4/mesos,kaysoky/mesos,Gilbert88/mesos,gsantovena/mesos,jpeach/mesos,jpeach/mesos,chhsia0/mesos,zmalik/mesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,neilconway/mesos,Gilbert88/mesos,andschwa/mesos,Gilbert88/mesos,dforsyth/mesos,asamerh4/mesos,zmalik/mesos,zmalik/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,andschwa/mesos,yuquanshan/customizedMesos,asamerh4/mesos,neilconway/mesos,dforsyth/mesos,verizonlabs/mesos,craimbert/mesos,verizonlabs/mesos,jpeach/mesos,verizonlabs/mesos,abudnik/mesos,verizonlabs/mesos,reneploetz/mesos,gsantovena/mesos,dforsyth/mesos,chhsia0/mesos,neilconway/mesos,dforsyth/mesos,kaysoky/mesos,jpeach/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,craimbert/mesos,neilconway/mesos,chhsia0/mesos,chhsia0/mesos,abudnik/mesos,andschwa/mesos,asamerh4/mesos,andschwa/mesos,andschwa/mesos,yuquanshan/customizedMesos,craimbert/mesos,andschwa/mesos,reneploetz/mesos,craimbert/mesos,Gilbert88/mesos,kaysoky/mesos,jpeach/mesos,verizonlabs/mesos,gsantovena/mesos,zmalik/mesos,kaysoky/mesos,verizonlabs/mesos,craimbert/mesos,verizonlabs/mesos,dforsyth/mesos,yuquanshan/customizedMesos,kaysoky/mesos,chhsia0/mesos,reneploetz/mesos,jpeach/mesos,chhsia0/mesos,kaysoky/mesos,kaysoky/mesos,reneploetz/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,yuquanshan/customizedMesos,neilconway/mesos,gsantovena/mesos,reneploetz/mesos,abudnik/mesos,gsantovena/mesos,zmalik/mesos,zmalik/mesos,Gilbert88/mesos,gsantovena/mesos,craimbert/mesos,abudnik/mesos,abudnik/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,chhsia0/mesos,reneploetz/mesos,asamerh4/mesos,yuquanshan/customizedMesos,craimbert/mesos,abudnik/mesos,yuquanshan/customizedMesos,dforsyth/mesos