Visual D v0.3.42 rc 1

Changes from beta 2:

• search file
  • the same file is no longer listed multiple times if it is in several projects
  • '.', '/' and '' are considered the same in case insensitive non-regex searches to simplify finding a module in a package
  • case sensitivity button was restored inverted
• mago
  • added support for new AA implementation
  • preview for structs now shows first members
• installer now shows the version of Visual D about to be installed