Make a teal components easy to apply in non-teal apps

[gogonzo]

Change the classes to not depend on each other so it should be easy to include teal components into non-teal apps:

• FIlteredData should not depend on the TealData. FilteredData should be constructed with a simple list of data
• teal_module(s) should require simple list of data and not having FilteredData
• FIlteredData passed to the teal_module should be limited to necessary API
• show R code should not depend on a FIlteredData and chunks
• data_extract and data_merge should work with list of data + join keys instead of depending on the FilteredData.

[gogonzo]

closing and archiving in favor of #2