Mods to fix #93. Eliminated -[NSFNanoEngine NSFP_setFullColumnNamesEnabled]. In all invocations of -[NSFNanoResult valuesForColumn:], all references to columns of the form <tableName>.<columnName> are reduced to just <columnName>. All unit tests pass.
Some code cleanup in -[NSFNanoEngine executeSQL:] around obtaining object values from a query.
Fixed #91: -[NSFNanoEngine isTransactionActive] works but misinterprets sqlite3_get_autocommit()
Fixed #92: The table "NSFP_SchemaTable" is never created, but NanoStore attempts to insert stuff into it.