#1 Add singleton method for srand()

[Sandy Smith]

Due to the potentially complex nature of Syntax apps,
there should be a singleton method to seed the random
number generator. The PHP manual says it should be
seeded only once, and two separate subapplications that
use it could conflict.

It would also be useful to have a reasonably random
default. I'm not sure if this should be in the base
classes or as part of the output classes.

[Nyk Cowham]

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This definitely make sense. Generally, I think we want to
resist adding new features until we are confident we have a
stable release version (I believe we are currently in beta,
and not alpha release at the moment).

I would classify this change more as a bug than a feature,
so it will be prioritized for inclusion in 0.0.4 release.