Merge pull request #36 from justgo129/master

Improved turtle readability
empty triple quoted predicates
Removed files called prov.ttl.tut except one

adjusted spacing

expansion of turtle to cover reciproal relationships
more spacing in turtle for images

more spacing in turtle for figure

spacing in turtle for table

spacing in turtle for findings

spacing in turtle for book

spacing in turtle for article

spacing for webpage
generalized entity-dataset-activity rel. in turtle for activities

more long literals in turtle for activities

spacing in turtle for activities

made dcterms:subject a long literal (in reports)

expanded prov.ttl.tut to cover reciprocal relationships

modified spacing at dataset/object.ttl.tut