Merge pull request #1 from jgkim/master

I've added a Korean translated version into the directory called 'kr'.
Suggestions for explaining in more detail what Open Data offers.
Merge pull request #2 from egonw/master

Suggestions for updated the advantages of Open Data.
updated acks to Egon and James and provided pointer to KR translation
added warning symbols for work required at each step. Expanded 4 and 5 * costs and benefits
Added links to graphite (alternative rdfa viewer), added a note to example 4 that RDFa is really triples not the tree it looks like in the source code
missed a full stop
Merge pull request #3 from cgutteridge/master

as suggested.
Replaced "identify" with "denote"
Merge pull request #6 from kidehen/master

Replaced "identity" with "denotes"
Added Japanese translation
Merge pull request #8 from fumi/translation-ja

Added Japanese translation
Merge remote-tracking branch 'upstream/master'