The Store extensions sucks. Fix it (or ditch it!)

[jdwije]

The Lewt Extensions store which is used for persisting data is a bit sucky. The extract method isn't even implemented!

This is a pretty important extension so it will pay to take the time to do things right.

[jdwije]

The question also remains whether store is needed... One of the original goals of LEWT was to allow for STDIN piping, this is yet to be implemented however if it were storage could be something like this:

lewt -p invoice -o store >> invoice.yml

Defaults could be configured as per regular settings config. This data could be reused by echoing it back into LEWT, then bypassing extract & process and piping this data straight into render like so:

cat invoice.yml | lewt --pipe render -o liquid

[jdwije]

The store workflow is now much nice. As above:

lewt -p invoice -o store >> invoice.yml

Then to reuse:

cat invoice.yml | lewt pipe render -m text

Store is still an extensions. The piping itself happens at the lewt class level, it's debatable whether this is a good idea - perhaps it can be refactored into stores extract method?