Add Allegro to the list of adopters
Add Allegro to the list of adopters

We're using marathon on top of the mesos 0.22.0

This closes: #43
Review: https://github.com/apache/mesos/pull/43

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