CMake 2.8.1-rc4

This commit cherry-picks and squashes the following commits:

  4685872 "FortranCInterface: Fix PathScale detection..." (2010-02-16)
  b39fe94 "Fix problem with ExternalProject test..." (2010-02-17)
  70290e1 "Add support for QtDeclartive module" (2010-02-17)
  282ba89 "Clarify CMAKE_MODULE_PATH documentation" (2010-02-18)
  4eba05d "Suppress GNU flag -fPIC on Windows" (2010-02-19)
  57efb4a "BUG: We shouldn't be setting the HideWindow..." (2010-02-19)
8 files changed