Added template sorter, MainTest separation

* Moved MainTests into a dedicated folder
* Added sorter for templates (sorts structs to top)
* Fixed all the broken tests
* Tidied up output.go functions
* Only creating one MainTest (main_test.go) per app run now
* Split test imports up into normal test imports & main test imports

main.go

@@ -24,13 +24,6 @@ func main() {
 		os.Exit(-1)
 	}
 
-	// Load all templates
-	err = cmdData.LoadTemplates()
-	if err != nil {
-		fmt.Printf("Failed to load templates: %s\n", err)
-		os.Exit(-1)
-	}
-
 	// Set up the cobra root command
 	var rootCmd = &cobra.Command{
 		Use:   "sqlboiler",