Technical debt: general code improvement

[gklyne]

This lists needs breaking down into minor usability fixes, technical code improvements, and significant new features.

Presentaton:

• ?Align type ID values used in local URI construction with type URIs/CURIEs
• Identifier display: try to find label instead of CURIE display; augment sitedata accordingly?

Technical debt:

• Clean up code for site data creation, rather than using a hacked test case
• Rename src/analist_site to src/annalist_root.
• update to Django 1.7
• re-work field rendering to use Django 1.7 capabilities (use code rather than templates? simplify context generation?)
• Convert literal CURIES to namespace references
• entity object should carry URI only. Other fields (host, path, etc. should be generated as required. Suggest use an internal value that allows x.uri.path, .host, etc. as required,) See also issue Web backend storage #32.
• rationalize/simplify fields and methods in site/collection model classes - there appears to be some duplication
• move util.py to utils package, and rename?
• look into using named tuples instead of dictionaries for rendering
  • cf. http://stackoverflow.com/questions/1336791/
• Investigate Python 3 compatibility
  • try running test cases with -3 option (cf. https://wiki.python.org/moin/Python2orPython3)
  • See also: https://docs.python.org/3/howto/pyporting.html

[gklyne]

Python 3 compatibility has been established in release 0.5.12 of the Annalist codebase, but there are some dependencies that aren't yet ready.

From 0.5.12 release notes:

All code has been updated to run under Python 3.7, but package dependencies Django 1.11 and rdflib-jsonld 0.4.0 are not ready (though easily patched).