Introduce MESOS_{MAJOR|MINOR|PATCH}_VERSION_NUM macros.
Introduce MESOS_{MAJOR|MINOR|PATCH}_VERSION_NUM macros.

This makes version based conditional compiling much easier for
module writers.

Review: https://reviews.apache.org/r/50992/

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