Log Message:
Update to 0.2.0.

Changes:
* Removed excessive assertion in seconomy-gtk.c.
* Fix snet header file inclusion.
* Only sa_handler OR sa_sigaction in handler (cross compatibility).
* Repaired two bugs in sgame/soptions.c (fixes solaris compiles).
* License restricted to version 2 of the GPL.
* Easter Egg wars :)