Merge pull request #17 from XxShenglixX/master

Fix NULL case for compare_DictionaryData, fix determineNumberOfBitsRequired
Fix NULL case handle and char to unsigned char in Compression
Switch dictionary size in test_LZ78_CompressorDecompressor to 4096
Input source file and output decompressed file are verified with VBinDiff
README compression ratio 41.8%
libjansson-4.dll compression ratio 37.9%
StringObject.o compression ratio 39.2%