PSP Upadate 1.4.1

Next step in 1.4.x branch is made. Changes are:
- fixed range checking bugs here and there;
- improved error reporting and made PSP more verbose, new error_reporting and error_halt
options in psp.conf;
- added GZIP output compression support, included PasZLib library, added new gzip unit and
gztest.pp example;
- updated docs, added PSP FAQ and provided some information about crosscompilation.
We hope you enjoy this release while 1.4.2 is comming next month or maybe later.