Compare keyword constants in lowercase.
Save calls to preg_match(). #performance
Hard-preload Event, Exception & Data. #performance

Hoa\Core\Event, Hoa\Core\Exception and Hoa\Core\Data are not useful
everytime. By hard-preloading them, we save I/O accesses and parsing
time.
[auto] Merge from Core

    • #4a60123 — Compare keyword constants in lowercase. (Ivan Enderlin, 2013-02-19)
    • #a5aff79 — Save calls to preg_match(). #performance (Ivan Enderlin, 2013-02-19)
    • #47533e6 — Hard-preload Event, Exception & Data. #performance (Ivan Enderlin, 2013-02-19)

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Merge remote branch 'library-core/master'