[ofw] svn.1844 commits

[Smith, Stan]

[WinOF]
CustomActions.vbs
  rewrote/cleanup device uninstall to use 'devman driverfiles' instead of guessing what
  files are installed for each driver.
  Added msiexec.exe cmd-line arg DBG=1 for install & uninstall - provides debug insights
  to what's going on.

wof.wxs
  Remove ibinstaller.dll references
  Prep for WinOF 2.1 Release
  Remove erroneous file dup/copy for files installed via driver .inf

README_release.txt & Release_notes.htm
  Prep for WinOF 2.1 release.