Changes since v0.6.0
1. Renamed CHANGES to changes.txt; added src/version.h
2. Updated aclocal.m4; added support for CPPFLAGS (based upon patch
   from Rafael Laboissière)

Changes since 0.5.0
1. Fixed uninitialized variable (John E. Davis)
Changes since 0.4.0
1. Some code cleanup (John. E. Davis)
2. Added object-oriented interface (John E. Davis)
3. Added support for prepared statements
4. Removed underscores from exception class names
5. Added some support for unsigned integers and long long integers
