Changed #import "/usr/lib/sqlite3.h" to #import <sqlite3.h>

Changed #import "/usr/lib/sqlite3.h" fails on MacOSX > 10.5.  Changed to #import <sqlite3.h> to correct issue.  Now compiles.
Merge pull request #3 from mjcargill/patch-1

Changed #import "/usr/lib/sqlite3.h" to #import <sqlite3.h>