Add fa_pg_schema_compare to compare two schema produced by fa_pg_schema_to_tcl.

Rename fa_schema_to_tcl to fa_pg_schema_to_tcl.

Extend fa_pg_schema_compare from Pgtcl's compare.tcl (also written by KL) to produce CREATE INDEX and DROP INDEX statements, to uppercase SQL keywords such as ALTER, TABLE, CREATE, DROP, INDEX, and ON.  Enumerate missing tables as SQL comments.

Expand README with example usage.

Add BSD license file.
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