[vala] (21 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
  0d34992... Add helper methods to CodeNode for dealing with attributes
  da725f6... On-demand Delegate.has_target
  763b799... On-demand Class.is_compact
  ab977d2... On-demand Class.is_immutable
  6a17ba6... On-demand Struct.is_simple_type
  d882b21... On-demand Struct.is_boolean_type
  db75714... On-demand Struct.is_integer_type
  e2ef1be... On-demand Struct.is_floating_type
  217d644... On-demand Struct.rank
  c2a8744... On-demand Struct.width
  2a87559... On-demand Struct.signed
  8b0b104... On-demand Struct.decimal_floating_type
  18f295b... On-demand Struct.is_immutable
  0f72a2b... On-demand Symbol.deprecated
  38b6649... On-demand Symbol.deprecated_since
  50362dd... On-demand Symbol.replacement
  b81fd8a... Drop Symbol.process_deprecated_attribute
  55dacea... On-demand Symbol.experimental
  5dc9693... Drop Symbol.process_experimental_attribute