update docs to adjust for naming change

first step to updating doc to adjust to new project name change

Change-Id: Ia27af1eb34314dec1761b3fb5583139a0186d257
Add a note about permissions to ceilometer logging directory

In case of swift monitoring swift needs to init logger for ceilometer.
So it needs to have corresponding permissions on log dir.

Change-Id: I67b4b8e438f7d51dba0575ffaacc0d43ef5040da
Merge "update docs to adjust for naming change"
Merge "Add a note about permissions to ceilometer logging directory"