[vala] (15 commits) Created branch wip/attributes-clean

[Luca Bruno <lucabru src gnome org>]

The branch 'wip/attributes-clean' was created.

Summary of new commits:

  9171264... Specify default values in Attribute methods
  c965c70... Add attributes cache to code nodes
  d32b926... Add helper methods to CodeNode for dealing with attributes
  351aebc... On-demand Delegate.has_target
  f07341d... On-demand Class.is_compact
  363eff2... On-demand Class.is_immutable
  8e358a1... On-demand Struct.is_simple_type
  dab179a... On-demand Struct.is_boolean_type
  67c0ea7... On-demand Struct.is_integer_type
  2857d96... On-demand Struct.is_floating_type
  434192d... On-demand Struct.rank
  89300d7... On-demand Struct.width
  92f2b6f... On-demand Struct.signed
  3d419c2... On-demand Struct.decimal_floating_type
  dc28f65... On-demand Struct.is_immutable