Handles some exceptions.
Added status bar and new resources to show user information about errors.
Removed unnecessary enum and icon color setting function
Fixed lints.
Added own resources; removed magic constants.
Fixed bug that would reset displayed index to 0 on edit.
Merge pull request #182 from angathorion/exception-handling

Exception handling, prettification and notification of invalid input.
Update README.md

Add dependency on Qt.
Merge pull request #185 from lowjoel/fix-readme

Update README.md