Added utility functions for user metadata and 2i
Enhanced unit tests for riak_obj
Enhanced interface flexibility.
Updated with information about metadata and secondary index functionality.
Corrected ping() spec
Updated/corrected following review.
get_metadata/1 no longer throws no_metadata exception
Updated doc and added utility functions for links.
Corrected doc formatting error.
Corrected doc formatting error.
Updated sibling resolution section
Updates following review
Corrected metsdata test
add get_metadata test back to newcontent0_test as well
Merge PR #82 from branch 'cd-metadata_exceptions'
Merge PR #81 from branch 'cd-doc_and_metadata_update'