0.5
 - Update mongo-c-driver and libbson to 1.1.10
 - New method 'iterate' to retrieve records without simplification
 - POSIXt timestamps and raw vectors are inserted as native types
 - Fix for authentication to database specified in the 'url'

0.4:
 - Add support for export() and import()
 - Update mongo-c-driver and libbson to 1.1.7
 - Make 'verbose' parameter global

0.3
 - Update mongo-c-driver and libbson to 1.1.5
 - Add support for map-reduce

0.2
 - Initial release
