pexec 1.0-rc3

1.0rc3: new features, changes and fixes since pexec version 1.0rc2
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* new: hypervisor mode, `-H|--hypervisor` + all related functionalty
* new: additional section in the manual discussing the hypervisor mode
* fix: some minor fixes in the hprintf() and get_number_of_cpus()
* chg: the command line option -d|--daemon has been changed to -T|--tunnel
(this switch this is used only internally when executing
pexec daemons via a remote shell, i.e. this change would not
affect the end-user interfaces; however the same version of pexec
must be installed on both sides)
* new: `make deb` creates a debian package on the current architecture
(this feature requies the `dpkg-deb` utility)