Merge lp://staging/~linuxjedi/libdrizzle/5.1-prep-stmt-cleanup into lp://staging/libdrizzle

Adds a JDBC like interface to libdrizzle. Now to set query params there are functions like:

drizzle_return_t drizzle_stmt_set_long(drizzle_stmt_st *stmt, uint16_t param_num, uint32_t value, bool is_unsigned);

and

drizzle_return_t drizzle_stmt_set_string(drizzle_stmt_st *stmt, uint16_t param_num, char *value, size_t length);

And to get result params:

uint32_t drizzle_stmt_get_long(drizzle_stmt_st *stmt, uint16_t column_number, drizzle_return_t *ret_ptr);

and

const char *drizzle_stmt_get_string(drizzle_stmt_st *stmt, uint16_t column_number, size_t *len, drizzle_return_t *ret_ptr);