Add some tags to optimize for zenback

For more detail about tags, refer to the following article.

http://nanapi.jp/29761/
Merge pull request #49 from satoryu/feature/optimize_for_zenback

zenbackの関連度合いを向上させるタグを挿入する
update dependency: rspec-2.13.0
added rubykaigi 2013
update latest api endpoint
fix endpoint
it works
Merge pull request #52 from tdiary/update-json-url

Update json url
fix lwws_to_html: indent, handled old data
oops
style
bugfix: can't displayed old date
workaround
add comment emoji autocomplete plugin, not supported by IE
fix :+1: image name
update image-gallery ... update for tDiary 3.2.2. (change of
TDiary::Config class.)
add puboo plugin
update /lib/exifparser ... fix "Copyright" tag was not available on Ruby 1.9.
fix error on Ruby2.0
-check SOI
fix url