Release v0.9.5

• yard doc will now generate .yardoc/processing and .yardoc/complete files
  to allow other tools to properly detect when YARD is in the middle of parsing
  source files, and when it has completed writing the database.
• Added support for on-demand generation of LibraryVersion objects using the
  :disk source type. LibraryVersion objects pointing to a .yardoc database
  directory will now auto-generate if there is a source_path attached.
• Added warning for macros attached to non-method objects.
• Fixed a few more parsing errors.