Merge pull request #9 from Takashi-U/master

Add news (3.6.1 is released)
3.6.2 released
add trello for nanoc4.0
design is changed
delete news_archives layout
nanoc study group vol 0
3.6.3 is released
guard-nanoc 1.0.0 is released
add explain for guard-nanoc
add breadcrumbs
add tips
Use static data source to handle static assets.
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Merge remote-tracking branch 'upstream/master'