add Drawing page.

for gh-pages in Team Repository.

add Drawing pages for gh-pages

cause no Drawing page for gh-pages

modified some sentences.
Merge pull request #34 from kotaitoda/gh-pages-forTeam130427

add Drawing page.
modified World and add Drawing

world->refWorld
add Drawing
name changed

world -> refWorld
changed some
Merge pull request #35 from ganow/gh-pages

add element/brain/movement base class
file name fixed