preliminary things

	new file:   HuffmanCoding/src/huffmancoding/Compressor.java
	new file:   HuffmanCoding/src/huffmancoding/Decompressor.java
	new file:   HuffmanCoding/src/huffmancoding/HuffmanCoding.java
	new file:   HuffmanCoding/src/huffmancoding/coding/Coder.java
	new file:   HuffmanCoding/src/huffmancoding/coding/Knot.java
	new file:   HuffmanCoding/src/huffmancoding/coding/Leaf.java
	new file:   HuffmanCoding/src/huffmancoding/coding/Node.java
	new file:   HuffmanCoding/src/huffmancoding/coding/Tree.java
preliminary