Merge pull request #212 from jhotta/ja-jp

super rough cut of 1st translation
Merge pull request #215 from jhotta/ja-jp

"Getting Started with the Agent" part is done.
Merge branch 'ja-jp'
replaced with current desktop screen capture images
A quick bug fix of screen capture and wording.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	content/guides/alerting.html
compile with utf-8 in mind
speeding up syntax highlighting
add documentation for 'last' method of ranking top series
Merge branch 'master' of github.com:DataDog/documentation
Merge pull request #221 from DataDog/atw/document-last-metric

add documentation for 'last' method of ranking top series
Merge pull request #219 from jhotta/master

quick bug fix of "Guide to Alerting"
Add link to the new codahale metrics library and fix old links
Fix one more link to codahale metrics
Merge branch 'master' of github.com:DataDog/documentation

Conflicts:
	layouts/basic_agent_usage-ja.html
Update monitor screenshots
Resize images
Merge pull request #223 from DataDog/isaac/update_monitors_screenshots

Isaac/update monitors screenshots
Update edit monitor image
Merge pull request #224 from DataDog/isaac/update_monitors_screenshots

Update edit monitor image