When loading datasets, set ACCEPT headers based on available readers.
Minor fix to README.markdown
… known both by symbol and file extension.
…k-linkeddata and sinatra-linkeddata.
…n the ordered list of content-types.
…tation. #to_sxp operates on these binary representations, so define #to_sse to transform to binary S-Expressions and then to the string representation using #to_sxp. This allows easy use of expr.to_sse to get the SPARQL S-Expressions string representation.
…n as an option.