Fix a strange cast in PHP.

`(string) 1.0` is equal to "1" instead of "1.0", so we use `sprintf`
instead.
Constant representation does not depend on locale.
Replace `_` by `Realdom` in classnames.
New class() implementation based on Praspel tools.
[auto] Merge from Realdom

    • #7b3470f — Fix a strange cast in PHP. (Ivan Enderlin, 2013-11-27)
    • #06083ac — Constant representation does not depend on locale. (Ivan Enderlin, 2013-12-12)
    • #3cafad2 — Replace `_` by `Realdom` in classnames. (Ivan Enderlin, 2013-12-12)
    • #3feed2b — New class() implementation based on Praspel tools. (Ivan Enderlin, 2013-12-12)

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Merge branch 'master' of /var/lib/git/repositories/Library/Realdom