Add trace output for EC2 API calls.

This will help with debugging salt-cloud calls. The status code
only provides limited information. Amazon will post back what
actually happened. This will output the body of the response
in TRACE output.
It's `salt` not `self`. Refs 418bd3e4.
Merge pull request #11941 from s0undt3ch/develop

It's `salt` not `self`. Refs 418bd3e4.
Merge pull request #11938 from terminalmage/docs

Add svnfs to toctree
Move checking args for newlines from yamlify_arg into parse_input

The key=val was getting split before getting passed to yamlify_arg and
wasn't working.
Merge pull request #11942 from whiteinge/bug-yamlify-arg-with-newline

Move checking args for newlines from yamlify_arg into parse_input
Fixed some issues found while testing
Master and Minion now startup and join in external raet.
But still some problem with running salt client. Returns get lost.
Merge remote-tracking branch 'upstream/develop' into sam_raet_36
comment out wing debug
remove extra space
Merge pull request #11945 from UtahDave/develop

remove extra space
Merge pull request #11946 from SmithSamuelM/sam_raet_36

Made many changes to get master and minion to bootup with external raet
Merge pull request #11939 from bretep/add-trace-logging-to-ec2-driver

Add trace output for EC2 API calls.
Allow passing `global_options`
Merge pull request #11947 from s0undt3ch/hotfix/pip-global-options

Allow passing `global_options`
Add new docs RST autosummary page