Infer schema information from SELECT clause

[crisptrutski]

Fixed #35

[crisptrutski]

• Generate stable Scope IDs #67 : 2 dependent PRs (#69 , #71 )
• Infer schema information from SELECT clause #65 👈
• Fix column-less aliases resulting in phantom source columns #64
• Handle pseudo tables from subselects and CTEs #61
• Avoid phantom column references from compound queries #60
• Add a bunch of compoud query fixtures, with dubious analysis #56
• Track unique ids for each scope #54
• master

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[crisptrutski]

Merge activity

• Jun 21, 7:58 AM EDT: Graphite rebased this pull request after merging its parent, because this pull request is set to merge when ready.
• Jun 21, 7:59 AM EDT: @crisptrutski merged this pull request with Graphite.