Neat 0.2.0: "We live in a society / Bottom type." --Donald Knuth

Oh yeah, I make releases. I forgot.

• Tuple field names are now part of the type.
  • A tuple implconvs to another by the rule that fields without names convert to fields with names. Fields with conflicting names do not implconv.
  • Tuple literals can specify names as (a=2, b=3).
  • A tuple implconving to another where only names are changed is called a "trivial conversion", ie. a conversion with no effect on the stored data.
  • If T trivially converts to U, then T[] implicitly converts to U[].
• Support template shortcut syntax: keyword name(T) => template name(T) { keyword name {} }.
• Implement nontrivial IFTI.
  • Function template calls can now infer template parameters even with indirect relations, such as (T)(T[] array).
• Array index access is now bounds checked.
• Support class method overloading.
• Add bottom type.
  • bottom is a type that contains no values. The D equivalent is called noreturn.
  • break, continue and return are expressions of type bottom. This enables .case(foo: break) and the like.

And many fixes, the most important one maybe being that-j should now work reliably.

I also want to direct special attention at the GTK demo, which uses macros to make the GTK object system pretend to be Neat classes.