Create capisuite-checkconfig

as it is very helpful since it creates the per-user spooldirectories
without having to fiddle around manually
don't return empty user-values, but return default instead

since otherwise it contradicts the documentation when e.g. sending mail
notifications, as the code that requests e.g. the fax.email property
provides the user as default.
But when using the empty string as documented to use the user's name as
sender, it returns the empty string and that then causes sending the
mail to fail, as there is no recipient.
first argument to _getLock is mandatory

even if it is overruled by the named options that are also specified
otherwise python complains with the slightly confusing error:
"method requires 1 argument (2 given)"
use tiff2pdf instead of converting first to ps and then to pdf

this is not only a lot faster, but also allows lossless conversion.
Along that line, don't try to alter the pagesize during conversion to
PDF. PDF-viewer applications do a great job adjusting to the paper-size
as the user wants it, so let the user make the decision. After all when
having the PDF, it is unlikely that it will be printed out anyway.
default to sendmail command again to allow for lightweight MTAs

probably the reason why people had problems with the sendmail-command
method was because the code passed an invalid envelope-from string. Fix
that by removing the envelope from and have it set by the MTA.

Also switch from the deprecated popen2 to using corresponding methods of
the subprocess module.
Merge pull request #1 from cloph/pr_sendmail

default to sendmail command again to allow for lightweight MTAs
Merge pull request #2 from cloph/pr_tiff2pdf

use tiff2pdf instead of converting first to ps and then to pdf
Merge pull request #3 from cloph/pr_param_count

first argument to _getLock is mandatory
Merge pull request #4 from cloph/pr_config_empty

don't return empty user-values, but return default instead
Merge pull request #5 from cloph/pr_checkconfig

Create capisuite-checkconfig target