plz add data format supportting, thx

[heartacker]

hi this ext is very usful, and it will be better for add format support，
for example:
I want to convert dec-hex;
10-->0xA
350--0x15E
I want this ext can provide the option that we can specify the "Length", like:
10--->0x00A
350-->0X15E
so that I can align my code easier.
for example:
befor converting, user can input an number(dec->hex).
if number is 8:

10--->0x0000000A
350-->0x0000015E

if number is 4,then

10--->0x000A
350-->0x015E

those is better than

10-->0xA
350--0x15E

(dec->bin):
8: 10 -->0b00001010
4: 10-->0b1010
thank very much