Merge pull request #81 from cpfaff/litrature

Adds more literature type coercions
don't use uuid directly (#82)
note on using RHTMLForms (#82)
links added to the advanced tutorials
advanced parsing tutorial draft
set default scope as 'system', not 'document'
updated documentation, test suite passing
troubleshooting various minor bugs arising from recent changes not caught earlier.
Avoid warnings from collate list, validation errors from missing contact when only creator config provided, tweaks to publish_knb().  Still
need some tweaks to eml_read to handle identifiers directly.  Still testing on tutorials and vignettes.
Adds testing for literature module

o Test for article and book coercions
o Belongs to issue #27