improved splitpane
made loan adding worked
fixed bug with first table row
added enabled and disabled for Adding Loan
added better status to customer
fixed some bugs
added validation and error message for exemplar_id in addLoan
added loandetailwindow
worked on LoanDetail
added main Observer on Library
fixed some Observer problems
bla
added detaching of observers on window close
fixed problem on copies
testicles
Merge branch 'develop' of
https://github.com/marcelamsler/miniprojectUI.git into develop
fixed problem on detailbookwindow-table