Merge branch 'SaveLoad' of https://github.com/wszib-kolo/sapper into MvcStructure
Update current repository for future work.
MVC structure: added new package 'controller' and migrated Save Load and Bridge to new package, along with test classes
MVC structure, commit without unnecessary files
Merge branch 'master' of https://github.com/wszib-kolo/sapper

Conflicts:
	src/main/java/gui/SapperGui.java