Made LawnMower know about lawn and house dimensions, and check if house is larger than lawn
Added method to calculate lawn area
Implemented method for calculating cutting time
Return int instead of float from LawnMower.getCuttingTimeInSeconds()

This is to ease implementation of a method to calculate hours and minutes.
Implemented LawnMower.getCuttingTimeAsString
Implemented main method with JOptionPane Interaction
Implement make clean
Display icons and titles with messages