Adding documentation
Merge pull request #9 from RockerM4NHUN/master

Adding documentation
Fixing
Merge pull request #10 from RockerM4NHUN/D

D
NewEditWindow
Data+errors

Data beolvas, kiír, main-be DataHandler, savedata, pár help, + error
trycatch classok
Merge pull request #11 from RockerM4NHUN/K

Data+errors
Merge pull request #12 from RockerM4NHUN/master

Update K
Edits
Merge remote-tracking branch 'origin/K'
Merge remote-tracking branch 'origin/master' into N