Merge pull request #295 from DilumAluthge-forks/dpa/write-info.plist

In the "Error writing Info.plist" error message, including the path to which we failed to write

Author: sveinbjornt

Shared/PlatypusAppSpec.m

@@ -415,7 +415,7 @@ - (BOOL)create {
                                                                  options:0
                                                                    error:nil];
     if (!infoData || ![infoData writeToFile:infoPlistPath atomically:YES]) {
-        _error = @"Error writing Info.plist";
+        _error = [NSString stringWithFormat:@"Error writing Info.plist: '%@'.", infoPlistPath];
         return NO;
     }