Docs - need updating for "pcs" compatability (Redhat 6.6+)

[Hasgaroth]

Firstly, the docs are excellent! Very well structured and written, but I have been trying to follow them on a Redhat 6.6 system and have run into a few problems with the updated sections relating to the "pcs" commands.

Firstly the command "pcs constraint colocation add writer_vip p_mysql role=Master" does not work and needs to be translated to "pcs constraint colocation add writer_vip ms_MySQL role=Master" just to get it to run, but that does not work as expected and produces an error saying the format is invalid.

It would be good to have the documentation updated to remove all references to "crm" and replace with the "pcs" equivalents, and validate that all works as expected.

Thanks in advance,
Dave