Merge 'heads/0.5': Bumped version to 0.5b2 for Roxen 1.2 beta 1 mk 2.

src/version.c

@@ -12,5 +12,5 @@
 void f_version(INT32 args)
 {
   pop_n_elems(args);
-  push_text("Pike v0.5b1");
+  push_text("Pike v0.5b2");
 }