Add in the changes to the renderers for streaming support.
Change all the existing converted plugins over to the new mechanism.
Add in example of a special-cased text renderer, but basic information for all other renderers.
Merge branch 'unified-output' into unified-stream-output
Merge branch 'unified-output' into unified-stream-output

Conflicts:
	volatility/commands.py
Merge branch 'unified-stream-output' of github.com:volatilityfoundation/volatility into unified-stream-output
Add in basic checking to the output file parameter for sqlite.
Merge branch 'unified-stream-output' into unified-output