Comment out non-select commands in grammar for now.
End lemonade rules with `.', not `;'.
Comment out command rule of phrase for now.
Fix select_columns1(many) rule.
Add WHERE rules.
Add LIMIT rules.
Simplify SIMILARITY rule, add WITH RESPECT TO and column lists.
Add `WITH <col>' / `OF <col1> WITH <col2>' rules.
Use L_NAME for column names, table_name for table names.
Fix typo in comment.
Add trivial expression rules.  No arithmetic, functions, &c., yet.
Add trivial literal rules.  Lemonade accepts the grammar now.
Copy external notes from Venture.
Prepare to import Plex 1.1.5, a Python lexer library.
Import Plex 1.1.5, a Python lexer library.

http://www.cosc.canterbury.ac.nz/greg.ewing/python/Plex/Plex-1.1.5.tar.gz
SHA-256: 7384404463934f41e8647643c26e0a6019bb1e6be5edece4d049ea36fe8c078d
Add a step for external sources: push vendor branch upstream.
Merge tag 'vendor/plex-1.1.5'
Fix previous to use vendor branch, not release tag.
Add self-test script.
Prepare to import lemonade 1.0b1, a Python LALR parser generator.