Added support to decode ProntoHex

[jorgecis]

Change to the gc_decode to allow decode Prontohex codes, here is an example

./gc_decode -prontohex -raw "0000 0068 0000 000D 0060 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0438"
Code length 30
Code type 4 (SONY)
Code bits 12
Code value 0x90
Code address 0x1
Code command 0x10
uint16_t rawbuf[26] = {
2400, 600, 600, 600, 600, 600, 600, 600,
600, 600, 1200, 600, 600, 600, 600, 600,
1200, 600, 600, 600, 600, 600, 600, 600,
600, 27000};

[crankyoldgit]

LGTM!
Minor nitpick: You should probably rename it from gc_decode.cpp to something more generic now. ;-)

[jorgecis]

Yes, I know but I didn't get a good name for it

[crankyoldgit]

@jorgecis I've approved it. Let me know if you can't merge this now. If not, I'll do it for you. (i.e. I can't remember if "approved" gives people permission to merge/submit or not.)

[crankyoldgit]

I couldn't come up with a good name either. So, it can stay what it is for now. ;-)