Prepared LevelSet for tests.
Tests for LevelSet.
Fixed tests for LevelSet.
XMLReader class and tests.h
Tests for XML attributes.
Reading attributes for XMLReader.
Some extended functionality for XMLReader.
Moved XML levelset reading from QtXml to XMLReader. Removed all Qt includes in levelset.
Fixed bug due to changes in LevelSet.
Replaced reading filename from command line with plain argv and realpath().
Settings class instead of QSettings. Removed all Qt4 from SokobanWidget and main().
Completely removed all Qt headers and classes.
Moved project from qmake to Makefile. New source tree: src, test, res directories.