Text Compression

• The amount of bits used for representing the characters' codes length is now dynamic, choosing between 3-6 bits. The previous, hard-coded value was 4 bits. This means

1. a bit better compression in smaller files
2. increase of the maximal code length from 2^4 - 1 = 15 to 2^6 - 1 = 63. This means that the compression is now able to compress files with much more characters, and it's very unlikely that any ordinary text would exceed that value.

• Removed some methods meant for debugging purposes