WebLoader.load -> webLoader.load; similarly nodeLoader and fileLoader.

The load methods do not use 'this' and can be simply functions.

Review URL: https://github.com/google/traceur-compiler/pull/575

Closes #575.
Replace WebPageProject in runner.html with new WebPageTranscoder

Loader based testing rather than Project based.

Review URL: https://github.com/google/traceur-compiler/pull/573

Closes #573.
Add test for static methods in export/import

Works for me

Review URL: https://github.com/google/traceur-compiler/pull/574

Closes #574.