Update home page.
Beef up the docs for "sprite"
Try to clarify the docs for polygon a bit.

The use of the word "center" here confused me in the previous description - here's an attempt to clarify how it will behave.
Merge pull request #22 from dobesv/patch-2

Try to clarify the docs for polygon a bit.
Merge pull request #21 from dobesv/patch-1

Beef up the docs for "sprite"
Merge pull request #1 from evancz/master

get changes from upstream
Extracted constants & methods
Fixed typo
Extracted constants
Extracted constants
Unified grammar style
Unified style
Improved indentation

See https://github.com/thSoft/elm-lang.org/commit/5bbb17b6cb8df3ef9244feb83ca5b4c5443d61fe#commitcomment-2529345
Renamings

See https://github.com/thSoft/elm-lang.org/commit/698e7090e7ef32ac4ddaedec24a0eb48425322eb#commitcomment-2529383
Fixed long lines & other code style improvements

See https://github.com/thSoft/elm-lang.org/commit/1a2fd11c5c395d2c694a6bd50b1845de3beecf22
Merge pull request #23 from thSoft/master

Extracted stuff in examples & documentation nitpicks
Switch back to the older Pong. It was making me crazy! Also, it was quite a bit slower to compile.
Add the walking/jumping Mario example.