Merge "Add support for the PointerLocation overlay." into gingerbread

            status_t            append(const char* other);

            status_t            append(const char* other, size_t numChars);

            status_t            appendFormat(const char* fmt, ...);

            status_t            appendFormat(const char* fmt, ...)

                    __attribute__((format (printf, 2, 3)));

            // Note that this function takes O(N) time to calculate the value.

            // No cache value is stored.