Added all experimental features to CHANGELOG for 1.1.0.
Added all experimental features to CHANGELOG for 1.1.0.

Review: https://reviews.apache.org/r/53382

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