Multipage answer records counter

[kir0st]

https://github.com/usher2/u2ckbot/blob/master/answers.go, line 519
res += fmt.Sprintf("\u2195 результаты с *%d* по *%d* из *%d*\n", offset+1, offset+PRINT_LIMIT, len(a))

need add check for case:
if (offset+PRINT_LIMIT) more than len(a)

Example:
/d_jhhn57s82mg14 contains 9 recodrs, page 2:

результаты с 6 по 10 из 9