Add ByteCount([]byte, byte) int, Count(string, string) int

[gonyyi]

This will be used to check if number of delimiter is correct

// Count counts string lookup value from string s, returns total
func Count(s string, lookup string) int {
	count := 0
	for i:=0; i<len(s)-len(lookup)+1; i++ {
		if s[i:i+len(lookup)] == lookup {
			count += 1
		}
	}
	return count
}

// ByteCount counts byte `c` value from bytes `p`, returns total
func ByteCount(p []byte, c byte) int {
	count := 0
	for _, v := range p {
		if v == c {
			count += 1
		}
	}
	return count
}

[gonyyi]

Change: for ByteCount, only count single byte

[gonyyi]

Added 5904be4