Support SELECT ... FROM table_func(...)" in the parser

This is a part of dj's GSoC project.

Make the parser support

SELECT ... FROM table_func(parameters)

There is no execution yet. Attempt to run the statement should return an error.

The following is expected to work:

• The parser should allow this statement
• setup_tables() in SELECT code should check if parameters are base constants.
  • If they are not, emit an error.
  • If they are constants (i.e. everything would be ok), emit an error anyway. This way, we can have a minimal test suite.
• name resolution in other parts e.g. UPDATE/DELETE can be ignored for now.