* tbel: number to string by radix * Revert "tbel: number to string by radix" This reverts commit 0fd285d76b5f25002f84768ab490e750539509d0. * tbel: number to string by radix and new Error * tbel: number to Hexadecimal must be even-length. * tbel: add tests isBinary...isHexadecimal * tbel: Comments 1 * tbel: Comments 2 * tbel: Comments 3