Added class UpdateInstaller that performs the necessary instructions and install updates
Merge pull request #285 from vasyamikhalyuk/master

Work on update installer
navigation, move, edit, insert, delete done
Done issue #254
Done issue #232
Merge pull request #288 from Gudini/task

Done issue #254
Merge pull request #290 from Gudini/dir

Done issue #232
Merge pull request #286 from yalchik/master

work on issue #21