more dokan fixes:
more dokan fixes:

  * move pending-delete cleanup back into Cleanup() function, according to
    Dokan demo code that's where it should be
  * better detection of if/when the drive is ready, as well as reporting
    dokan subproc crashes


git-svn-id: 74b2def6592cf29d88d1a5d33b5c4a2732d8507c@404 67cdc799-7952-0410-af00-57a81ceafa0f

anthonybishopric/pyboxfs,pscottdevos/pyfilesystem,duedil-ltd/pyfilesystem,alekibango/pyfilesystem,pscottdevos/pyfilesystem,simonluijk/pyFilesystem,alekibango/pyfilesystem,anthonybishopric/pyboxfs,revolunet/pyfilesystem