Application crashes if not run in "source" directory

[raff]

The application tries to load the images from the current directory, and if they are not there it crashes.

Best thing would be to embed the images in the binary (there are a few packages to do that, like https://github.com/jteeuwen/go-bindata) but at least checking for the error would be good.

Also, when the crash happen, the terminal is left in a "bad state". I fixed by moving the termbox.Close() in a defer statement:

`diff --git a/main.go b/main.go
index f3aee8d..89bc0ef 100644
--- a/main.go
+++ b/main.go
@@ -96,6 +96,11 @@ func main() {
alienDirection := 1 // direction where alien is heading
score := 0 // number of points scored in the game so far

•    defer func() {
  

•       termbox.Close()
  

•       fmt.Println("\nGAME OVER!\nFinal score:", score)
  

•    }()
  

•   // poll for keyboard events in another goroutine
    events := make(chan termbox.Event, 1000)
    go func() {
  

@@ -243,8 +248,6 @@ start:
fmt.Println("\n\nSCORE:", score)
loop++
}

•   termbox.Close()
  

•   fmt.Println("\nGAME OVER!\nFinal score:", score)
  

}
`