LT-14166 Configure installer build to read FW build version

  * Create WIX extension to allow new preprocessor variable
  * Adjust Assembly info copyright messages to name SIL International

Change-Id: Ie1f785b63f6a0f4f4be3a953bed89fd73d8ad7d9
LT-14166 Installer to use files with version number in path

 * Installer builder copies Output\Release and DistFiles to
   a folder whose path includes the current FW build version
 * Installer is then built from the copied files. This enables
   patches to be built using the old copies.
 * Some refactoring.

Change-Id: Ic5db69d107211a1b96f9f7526012e8d8ea243545
Fix Component Installer Generator

 * Since we changed the FW RootCodeDir reg setting for FW 8,
   installers for movies etc. stopped working. In addition,
   we need to update to support the variable FW version number.

Change-Id: Iaaf5c7af5d2d365b27486140238999dd2cec8ae7