Implemented utility and error functions
Implemented utility and error functions

Moved the location of the sqlite3_errmsg to the new ‘Error Codes and
Messages’ section.

Implemented error handling functions corresponding to the following
SQLite functions:
        - sqlite3_errcode
        - sqlite3_extended_errcode
        - errmsg

Implemented utility functions corresponding to the following SQLite
functions:
        - sqlite3_get_autocommit
        - sqlite3_libversion
        - sqlite3_libversion_number

ShawnMoore/Swift1.2-SQLiteFramework