Huffman archiver, written in C

usage exmples:
	./hmzip -c file.txt
		Create archive with filename file.txt.hz
	./hmzip -x file.txt.hz
		Extract file file.txt

Archive file format:
2 bytes - count of codes in codemap
each code entry : 
	1 byte - char code
	2 bytes - string size
	n bytes - string chars
8 byte - original file  size 
x bytes - encrypted data