(HELP::OPTIONAL EXTERNAL DIRECTORIES): Document bin/ and patches/ directories

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
make doc

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
 bin/cygbuild.sh: (CygbuildInstallExtraBinFiles): add support for bin/FILE.cyginstdir install instructions

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
bin/lib/cygbuild.pl: Fix POD
make doc

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(CygbuildPatchFileList): Disregard */tmp/* or /*.tmp/* directories

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(HELP::Patch management commands):: document */tmp/* or /*.tmp/* directories in patch command

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
make doc

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
Merge branch 'devel'