[vala] (32 commits) Created branch 0.10-parallel

[Jürg Billeter <juergbi src gnome org>]

The branch '0.10-parallel' was created.

Summary of new commits:

  615c1cd... Report error on invalid using directives
  28cee66... gee: Replace interfaces by abstract classes to improve perf
  ce112ee... Support iteration via index to improve performance
  7f9b309... Create array lists in Method class only on demand
  95285bc... Improve performance of SemanticAnalyzer.is_type_accessible
  3d0261f... Do not create empty type parameter lists in parser
  d5a1b38... Simplify attribute objects
  8b6b7c0... SourceFile: Introduce SourceFileType enumeration
  7b9847d... CodeWriter: Introduce CodeWriterType enumeration
  2519c03... UnresolvedType: Improve .to_string()
  f83ab7c... MemberAccess: Fix crash in .to_string()
  009d5bb... CodeWriter: Add CodeWriterType.FAST enum value
  522e10c... valac: Add --fast-vapi= commandline argument
  97d420e... SourceFile: Add SourceFileType.FAST enum value
  95043b4... valac: Add --use-fast-vapi commandline argument
  f4c7291... SourceFileType: Add SourceFileType.NONE
  7da7e4f... Symbol: Add SourceFileType source_type
  2eddc7a... Properties, Methods: Relax some checks
  ab10bb1... valac: Output make-style dependency file
  6d0c5de... CodeWriter: Omit cheader_filename for fast vapi
  e155cbf... codegen: Run partial codegen on fast vapi files
  a6d9b01... CodeWriter: Do not replace .vapi if unchanged
  b2eab99... codegen: Skip visiting fast-vapis
  927fa85... codegen: Fix external constants
  64527ed... CodeWriter: Support non-constant expressions as default arg
  44648cf... Work around code writer issues with address of expressions
  43f66e8... CodeWriter: Support external symbols
  3d7b96f... Do not require interface implementations in fast-vapi
  bb5a253... UnresolvedType: Override is_disposable method
  683fdf8... CodeWriter: Do not do any sorting in FAST mode
  5a55c8f... Report error for private virtual methods
  976563b... Check accessibility of constants