Removed Gratipay button for webbedspace

I currently don't have a Gratipay account, so this button has no purpose.

Also cleaned up some whitespace in data-es6.js while I was at it.
Merge pull request #328 from webbedspace/gh-pages

Removed Gratipay button for webbedspace
Fixed several test code bugs.

Fixes #329, #330, #331, #332, #333, #334.
Fixed a Firefox result, and recompiled typescript.html
Merge pull request #335 from webbedspace/bugfixes

Fixed several test code bugs
November ES6 spec changes

This adds/removes/changes the following tests:

* RegExp.prototype methods
* Symbol.species
* String.prototype.includes
* WeakMap/WeakSet.prototype.clear
* Array.isArray on proxies
* JSON.stringify on proxies
Merge pull request #338 from webbedspace/november

November ES6 spec changes
Changed the block-scoping tests to check shadowing.

Shadowing (where an inner scope's same named variable shadows an outer-scope identifier, but doesn't replace it) is arguably a more commonplace feature of block-scoping, and the compilers tend to support it even if they don't support identifiers fully leaving scope (as in e.g. temporal dead zone). This closes #305.

The compilers had in fact already taken this into their account for their results, mostly. This corrects Traceur's result for BLFD.