first test using phoenix to write eUML actions/guards

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better example

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Merged in BGL, enable_if, and related changes from trunk: r67035, r57559, r72837, r73010, r73026, r72960, r73425, r73424, r73009, r73998, r73997, r73006, r73630, r73631, r73999, r73422, r73423, r73996, r71221

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Add automatic importing into the quickbook stream of code snippet escape docs. And add multi-file import with filename regex expressions.

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Remove tab indents.

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