Aubit 4GL SVN-Code

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remove some out of date info

remove the 'read_columns' - its now in sql_common.c and not required by each Sql driver

Add some encryption/decryption routines.

Add a pair of functions that will associate and free memory based on a 'key'.
This is typically used to assign memory which must be freed when a parent is freed (like extra memory associated with a cursor)

add asserts as MINGW can't perform some actions rather than silently ignoring the problem

move asql_read_columns from sql driver to common code.
Allow an encrypted password in the $HOME/.aubit4gl.acl file
(non-encrypted passwords are automatically encrypted)

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Odbc fixups for sqlserver

small fixups - adding more pdf functions