adding link to HHS data strategy doc
Removing note about retaining copyright

this is obsoleted by the Public Domain Dedication
Merge pull request #183 from project-open-data/new-policy-document-from-HHS

adding link to HHS data strategy doc
corrected a typo in the Presentation section and clarified the parenthetical metadata fields
corrected several small typos

corrected a typo around the 'line of business' line; as well as the sentence on /open, /developer, and /data pages; tightened a sentence about the /data page and data.gov; for the 'how do i get started' question, I clarified data.json instead of /data; and for the last question, I did the same.
added a missing space in the description of access level comment; corrected the agency code format to be 3digits:2digits
fixed anchor tag to schema maps
clarified the description for 'license'
removed a confusing and unnecc. clause in the 'extensional' sentence 

"to embedded HTML or XML markup" made the sentence confusing and wasn't needed for context
a few small typos in accessLevelComment

changed forof to for; corrected the singular plural/verb disagreement later in the sentence
Added a clarifying 'yes' to bureaucode - required.
added a clarifying note that the further metadata field guidance is alpha by json
Fixes #177 Update schema validator to match RFC 5646 (BCP 47) standard for language field
Merge pull request #191 from dwcaraway/master

Fixes #177 Update schema validator to match RFC 5646 (BCP 47) standard f...
Remove reference to dcat:dataQuality, which hasn't existed for some time
Fix all terms in example files
add HHS's validator to the tools list
Merge pull request #186 from project-open-data/small-typographical-corrections

Small typographical corrections
adding a section on the inclusion of the data catalog as a record itself in the catalog.
reordering programCode to keep it alphabetical in the Further Metadata Guidance section