Add a logo

This logo was created by Isaac Durazo (https://github.com/isaacdurazo)
and Sean Mize (https://github.com/mize)
based on https://github.com/voodootikigod/logo.js

Fixes #819

Review URL: https://github.com/google/traceur-compiler/pull/849

Closes #849, closes #819.
Use ExplodeExpressionTransformer for symbol transformer

Use ExplodeExpressionTransformer for `object[symbol] += expr`. This allows us to remove OperatorExpander.js.

Review URL: https://github.com/google/traceur-compiler/pull/846

Closes #846.
'Make' commands to tag builds and push to npm, master, and gh-pages, all...

... upstream.

The new targets are really just commands to be executed in order.
'git-update-publish' is the only one we need to issue. This command will only
work if you have write-permission to google/traceur-compiler

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/853

Closes #853.
traceur@0.0.26
traceur@0.0.26
Fix-up incorrect version push

TBR=@arv

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/854

Closes #854.
Fix super parsing

Update the parser to match the spec regarding how super is parsed.

The only valid cases for super are:

super.x
super[expr]
super(args)
new super

Fixes #837

Review URL: https://github.com/google/traceur-compiler/pull/848

Closes #848, closes #837.
Fix test-version on Windows

It turns out that when we call process.exit there might still be
characters in the buffer. Wait until the buffer is empty before
exiting.

Review URL: https://github.com/google/traceur-compiler/pull/855

Closes #855.
traceur@0.0.29
Fixup git-update-publish:  npm publish vN, update semver, push vN+1

Fixes #820

TBR

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/856

Closes #856, closes #820.
commonjs esModule flag