Started working on a seperate pgtypes library. First test work. PLEASE test compilation on iother systems.

Allow whenever statement to list function without parameters.

- More work on Informix compatibility.

- Started with an Informix compatibility option.

Michael

        - Removed some simple rules to work arounf bison limit for now.
        - Update c_keywords.c to reflect changes in keywords.c.

        - Synced preproc.y with gram.y.
        - Synced pgc.l with scan.l.
        - Synced keywords.c.

	- Fixed a typo in a comment printed by ecpg.

- Fixed one bug in structure handling resulting in using sizeof indicator instead of variable.

cannot see a reason why it should be an error.

        - Removed check for array input. An attribut might store the
          complete array.

- Fixed several bugs concerning arrays of structs including a memory
  allocation bug.

        - Fixed some bugs in exec sql var and exec sql type command.

        - Fixed bug that caused segfault when given incorrect DB name.
        - Fixed bug in ecpglib causing indicator to list the size of the
          variable instead of the size of the data.