quickfix

Modernize autotools: bootstrap uses autoreconf, renamed configure.in to configure.ac, generated a configure.scan with autoscan and merged it with existing configure.in.
The --with-mysql and --with-postgresql m4 scripts now use mysql_config and pg_config to ensure correct compile/link options.
Fixed typo in mysql create.sh script (missing echo).
Both postgres and mysql create.sh scripts work without prompting, so they can be run unattended (e.g. in jenkins).
Added required rpm/deb package dependencies to README.