Previous translations moved to source

I moved all of my translations from the main enchant.js file to the
source files.

I also cleaned up my work in a couple of places. In general, I've been
cleaning up little things like encasing parameter names in [] for
@param lines. Specific changes are listed below.

Core.js -- I finished going through its docs.
Event.js -- There were a lot of little things which were grammatically
correct and matched the wording of the Japanese documentation but which
didn't follow standard practices for programming documentation in
English. I cleaned that up.
EventTarget.js -- Added Japanese for EventTarget.on().

Concerns:

Core.js
- Lines 246 and 249 in my commit -- Should the documentation say
game.start() or Core.start()?
- Lines 926 and 951 in my commit -- Should these really be the same?
And should they really link to Core.start() instead of Core.resume()?
improve deferred insertion
fix typo
Merge https://github.com/Crowbeak/enchant.js into pullreq

Conflicts:
	dev/enchant.js
Merge branch 'develop' of github.com:wise9/enchant.js into develop
fix document (to restart Core, use Core#resume instead Core#start) #226
move task definitions into tasks/
update node version
define "install-jsdoc-toolkit" task
remove Rakefile
Merge branch 'tasks' into develop
modify jsdoc comments
modify task script
detect Internet Explorer 11 correctly
complement enchant.ENV.VERSION by template processing
duplicate frame sequence given to Sprite#frame (#202)
move anonymous event handler to Sprite#_rotateFrameSequence
rename Sprite#_setFrame to Sprite#_computeFramePosition and it will no longer modify Sprite#_frame value
Merge branch 'feature/sprite-frame-behavior' into develop
change Sound#load arguments (#224)