Calcpad version 5.9.5

Added global exception handling and data recovery.

All unhandled exceptions are now caught globally and reported to the user on screen.
Then, the data is automatically saved to a temporary file and the application is restarted.
The new Calcpad session attempts to recover and restore the unsaved data.
Even if it fails to recover, you can still find your data into the TEMP folder. Just search for the latest *.tmp file.

Even if crashes were extremely rare for Calcpad, now the risk for unexpected crash and loss of data is reduced to almost zero (I hope).