Handling of .line, .column and .location in std.d.parse.simpleParse()

[ghost]

This modifications are proposed because of #41

• it doesn't break any previous usage of the AST nodes StaticConstructor and StaticDestructor because the previous member location is not replaced (even if useless since now line and col are more usable).
• notice that there was a doubt about how-to because it would also be possible to implement the feature specifically for the two items instead of globally, in simpleParse().

[Hackerpilot]

The location field is used by DCD for locating these AST nodes by byte offset. Your approach of adding this feature to simpleParse makes sense.