Building Spirit + Miniboost

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tweaks

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more maintenance
removing the toplevel bjams
ading a readme.html
more...

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more maintenance
ading a readme.html
more...

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tweaks

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tweaks

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tweaks

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Final tweaks

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Spirit miniboost update.

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Added modified readme's

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Updated readme's for Spirit 1.8.5

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Merge from trunk.

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Merge from trunk.

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Merge changes to branch

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Merge from trunk

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Merge test fixes from trunk

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Change utility.py to use bjam variables to decide
that platform we're on.  It might be better to use
Python functions, but we know that bjam approached
works.

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Ported `alias` target type to Python.

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Assert that targets.BasicTarget.construct() always returns
a two element tuple.

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construct() now returns a list of virtual targets.

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