Better create -f functionality

[jw-maynard]

#504 Added very basic functionally for this. But all it seems to do is pick the correct API version which is not really implementing functionality equivalent to kubectl create -f as that command will:

• Take in multiple YAML docs separated by ---
• Call the correct API endpoint based on the kind defined in the document.

Would be cool if we could expand the initial functionality from #504 to work as stated above. Don't know if you guys think that's beyond the scope of this client.

Past issues: #591

[jw-maynard]

Whoops I miss read the examples!