Move classes from cache package to io package.

src/main/java/cz/it4i/qcmp/DataCompressor.java

 package cz.it4i.qcmp;
 
 import cz.it4i.qcmp.benchmark.CompressionBenchmark;
-import cz.it4i.qcmp.cache.QuantizationCacheManager;
-import cz.it4i.qcmp.cache.QvcFileReader;
 import cz.it4i.qcmp.cli.CliConstants;
 import cz.it4i.qcmp.cli.CompressionOptionsCLIParser;
 import cz.it4i.qcmp.cli.CustomFunctionBase;
@@ -11,6 +9,8 @@ import cz.it4i.qcmp.compression.ImageCompressor;
 import cz.it4i.qcmp.compression.ImageDecompressor;
 import cz.it4i.qcmp.fileformat.FileExtensions;
 import cz.it4i.qcmp.fileformat.IQvcFile;
+import cz.it4i.qcmp.io.QuantizationCacheManager;
+import cz.it4i.qcmp.io.QvcFileReader;
 import org.apache.commons.cli.*;
 
 import java.io.IOException;

src/main/java/cz/it4i/qcmp/benchmark/SQBenchmark.java

 package cz.it4i.qcmp.benchmark;
 
 import cz.it4i.qcmp.U16;
-import cz.it4i.qcmp.cache.QuantizationCacheManager;
 import cz.it4i.qcmp.cli.CompressionOptionsCLIParser;
 import cz.it4i.qcmp.compression.CompressionOptions;
+import cz.it4i.qcmp.io.QuantizationCacheManager;
 import cz.it4i.qcmp.io.loader.IPlaneLoader;
 import cz.it4i.qcmp.io.loader.PlaneLoaderFactory;
 import cz.it4i.qcmp.quantization.QTrainIteration;

src/main/java/cz/it4i/qcmp/compression/SQImageCompressor.java

 package cz.it4i.qcmp.compression;
 
 import cz.it4i.qcmp.U16;
-import cz.it4i.qcmp.cache.QuantizationCacheManager;
 import cz.it4i.qcmp.compression.exception.ImageCompressionException;
 import cz.it4i.qcmp.fileformat.IQvcFile;
 import cz.it4i.qcmp.fileformat.SqQvcFile;
 import cz.it4i.qcmp.huffman.HuffmanEncoder;
 import cz.it4i.qcmp.io.InputData;
 import cz.it4i.qcmp.io.OutBitStream;
+import cz.it4i.qcmp.io.QuantizationCacheManager;
 import cz.it4i.qcmp.io.loader.IPlaneLoader;
 import cz.it4i.qcmp.io.loader.PlaneLoaderFactory;
 import cz.it4i.qcmp.quantization.scalar.LloydMaxU16ScalarQuantization;

src/main/java/cz/it4i/qcmp/compression/VQImageCompressor.java

 package cz.it4i.qcmp.compression;
 
-import cz.it4i.qcmp.cache.QuantizationCacheManager;
 import cz.it4i.qcmp.compression.exception.ImageCompressionException;
 import cz.it4i.qcmp.data.Range;
 import cz.it4i.qcmp.fileformat.IQvcFile;
@@ -9,6 +8,7 @@ import cz.it4i.qcmp.fileformat.VqQvcFile;
 import cz.it4i.qcmp.huffman.HuffmanEncoder;
 import cz.it4i.qcmp.io.InputData;
 import cz.it4i.qcmp.io.OutBitStream;
+import cz.it4i.qcmp.io.QuantizationCacheManager;
 import cz.it4i.qcmp.io.loader.IPlaneLoader;
 import cz.it4i.qcmp.io.loader.PlaneLoaderFactory;
 import cz.it4i.qcmp.quantization.vector.LBGResult;

src/main/java/cz/it4i/qcmp/fileformat/SqQvcFile.java

 package cz.it4i.qcmp.fileformat;
 
-import cz.it4i.qcmp.cache.QvcFileWriter;
 import cz.it4i.qcmp.huffman.HuffmanNode;
 import cz.it4i.qcmp.huffman.HuffmanTreeBuilder;
 import cz.it4i.qcmp.io.InBitStream;
 import cz.it4i.qcmp.io.MemoryOutputStream;
 import cz.it4i.qcmp.io.OutBitStream;
+import cz.it4i.qcmp.io.QvcFileWriter;
 import cz.it4i.qcmp.quantization.scalar.SQCodebook;
 
 import java.io.DataInputStream;

src/main/java/cz/it4i/qcmp/fileformat/VqQvcFile.java

 package cz.it4i.qcmp.fileformat;
 
-import cz.it4i.qcmp.cache.QvcFileWriter;
 import cz.it4i.qcmp.huffman.HuffmanNode;
 import cz.it4i.qcmp.huffman.HuffmanTreeBuilder;
 import cz.it4i.qcmp.io.InBitStream;
 import cz.it4i.qcmp.io.MemoryOutputStream;
 import cz.it4i.qcmp.io.OutBitStream;
+import cz.it4i.qcmp.io.QvcFileWriter;
 import cz.it4i.qcmp.quantization.vector.VQCodebook;
 
 import java.io.DataInputStream;

src/main/java/cz/it4i/qcmp/cache/QuantizationCacheManager.java → src/main/java/cz/it4i/qcmp/io/QuantizationCacheManager.java

-package cz.it4i.qcmp.cache;
+package cz.it4i.qcmp.io;
 
 import cz.it4i.qcmp.compression.CompressionOptions;
 import cz.it4i.qcmp.data.V3i;

src/main/java/cz/it4i/qcmp/cache/QvcFileReader.java → src/main/java/cz/it4i/qcmp/io/QvcFileReader.java

-package cz.it4i.qcmp.cache;
+package cz.it4i.qcmp.io;
 
 import cz.it4i.qcmp.fileformat.*;
-import cz.it4i.qcmp.io.RawDataIO;
 
 import java.io.DataInputStream;
 import java.io.FileInputStream;

src/main/java/cz/it4i/qcmp/cache/QvcFileWriter.java → src/main/java/cz/it4i/qcmp/io/QvcFileWriter.java

-package cz.it4i.qcmp.cache;
+package cz.it4i.qcmp.io;
 
 import cz.it4i.qcmp.data.V3i;
 import cz.it4i.qcmp.fileformat.QuantizationType;