Added ES6-Transpiler column, and updated other compilers' results.

This updates the results for Traceur and JSX, as well as correcting a result for IETP.
Merge pull request #373 from webbedspace/es6tr

Added ES6-Transpiler column, and updated other compilers' results.
Separated Chrome results into flagged and unflagged values.

Now, Chrome features only available as "Experimental Javascript Features" are marked with a special cell, and do not contribute to its ES6 support percentage.
Fixed some resuls and minor build.js issues.
Rewrote build.js using cheerio.

I got frustrated with the current build script's limitations, so I rewrote it using CheerioJS (which is already used by the Node script). It is now more readable, though admittedly has a slight runtime performance hit.

Output should be structurally identical, but with slightly different whitespace.
Flagged support is now shown in header bar-graphs.

The percentage of flagged support is now shown in the browser header bars as a more transparent bar behind the normal bar.

Also, supertests containing flagged results are now marked with the fold triangle as well.

Also, merged Node and Node Harmony into a single column, treating --harmony as a flag.