Add official Solarized color labels in comments

# Friendlier XML…
_**Now with comments!™**_

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This is a small commit intended to make the reading the code faster and easier.    

As far as TextMate is concerned, the files should be yield identical results.

**The only changes are comments.**



## Summary of Changes

- After each color, there is now a comment containing that color’s official Solarized name.  (See [http://ethanschoonover.com/solarized/#the-values].)
- There are several colors from outside the official palette.  These colors’ comments are prefixed with `(nonstandard)` to clearly mark them as such.  Additionally, their comment contains the closest official color, prefixed with a tilde.  (E.g., a nonstandard color close to red is labelled `<!-- (nonstandard) ~red -->`.)