DOC-1149: New experiments_cfacter page.

I made an experiments_cfacter page. This is it.
DOC-1149 Edits to cfacter page

Nothing fancy; just some copy edits.
DOC-1149 Round two edits on experiments_cfacter

Edits to experiments_cfacter based on technical review from Kylo.
Merge pull request #383 from jbondpdx/cfacter

Cfacter