sql_gen.py: Col.to_str(): Take for_str param which does both concat() and str()/clean_name() instead of use_concat param which doesn't remove quotes from the strings before concatenating, causing strings to be incorrectly truncated

sql_gen.py: EnsureNotNull: Cast the null sentinel to the type it's the sentinel for, so that COALESCE returns the same type as the provided type, instead of potentially incorrectly assuming the constant's type. This fixes a bug where COALESCE returned an incorrect type.

sql.py: cast(): Use new sql_gen.Cast

sql_gen.py: Added Cast

sql_gen.py: concat(): Consider ")"s part of the existing suffix, so that parentheses match up

Removed extra trailing whitespace

main Makefile: Added explicit schemas/temp/reinstall target because vegbiendev (Ubuntu 12.04) seems to ignore %/reinstall

vegbien_dest: Added temp to schemas list so the intermediate tables will be created there, where they are easy to remove with `make schemas/temp/reinstall`

main Makefile: Added %/reinstall, which calls the corresponding uninstall and install targets

Added temp schema to store intermediate tables permanently when desired for debugging. It is not part of schemas/all because it should not be remade to include current intermediate tables when remaking other schema exports.