Initial attempt at RDF export
RDF export: Added support for Any attributes
RDF test: export all example graphs
Merge branch 'master' into rdf
Merged pull request #4 into the rdf branch
Merge pull request #5 from satra/enh/rdf

More updates to support RDF output
Add langtag getter to Literal
Merge pull request #6 from millr/patch-1

Add langtag getter to Literal
Fix #7

Add equality function to prov.model.Literal
Merge pull request #8 from millr/master

Added equality function to prov.model.Literal, fixed #7
Tighten up Literal equality testing

Previously raised exception if compared to object of different type rather than fail.
Fix comparison of Literal with non-literal
Fix comparison of records whose attributes are in diff orders

Order the attributes prior to comparison
Merge pull request #10 from millr/master

Equality testing fixes
Added JSON test files from ProvToolbox and a test for loading these
Fixed: Removed the duplicated Bundle definition in PROV_RECORD_TYPES
Changed: Updated examples (primer, bundles1, bundles2)
Changed: testAllExamples() will show the name of the failed graph
Changed: Removed ProvElement as the inferred record for influence
PEP8 clean-up
Changed: Improved mappings between default Python and XSD data types
- Some Literal objects are now automatically converted to standard Python types (e.g. int, long, unicode, float, datetime) to avoid mistmatch with JSON decoding's datatype mappings
- All strings are now automatically converted to unicode
Changed: Removed out-dated example_graph()