Qt implementation of LZ-String, version 1.4.4.

Based on the LZ-String compression algorithm found here:
http://pieroxy.net/blog/pages/lz-string/index.html

WTFPL Licence
http://www.wtfpl.net/

Implemented functions:

• compress() / decompress() - YES
• compressToUTF16() / decompressFromUTF16() - YES
• compressToBase64() / decompressFromBase64() - YES
• compressToUint8Array() / decompressFromUint8Array() - NO
• compressToEncodedURIComponent() / decompressFromEncodedURIComponent() - NO