Modify PipedSQL so it uses a LALR(1) grammer

Registered by David Rosenbaum

The PipedSQL lingo currently uses regular expressions and str.split for parsing. The lingo should be reimplemented using an LALR(1) grammer possibly using the ply module.

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Not started
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Priority:
Medium
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None
Direction:
Needs approval
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Definition:
New
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None
Implementation:
Unknown
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