Add install wmi to Windows source install docs
Add M2Crypto to install list
add pywin32 install. Fix m2crypto link
Merge pull request #5444 from UtahDave/develop

Add more items to the Windows source install docs.
Allow execution to continue if missing SLS, Fix #5430

Now it logs to ERROR rather than actually *raising* an error.
Don't let the JSON outputter fail because of unsupported types. Refs saltstack/salt-cloud#614. Fixes #5446.
Merge pull request #5448 from s0undt3ch/hotfix/abemusic-json-fix

Don't let the JSON outputter fail because of unsupported types.
Merge pull request #5445 from basepi/missingsls

Allow execution to continue if missing SLS, Fix #5430