finished #14404 http://redmine.ruswizards.com:8100/redmine/issues/14404
fixed crashes;
used single comparator;
change method of refresh data in list;
rename method getFileList to openFilder
data in adapter puts in a list;
Merge pull request #18 from eteplyakov/RM_14404_Lab_level_3_File_manager

RM14404 - Lab level 3. File manager