* src/RelImage.py: replace system call with Utils.search_for

* src/Utils.py: added search_for to look for an executable in the current
path

* FAQ: removed question 18 (how fast is GRAMPS)
* src/PeopleStore.py: set sort data for top level nodes. Allows the first
and last nodes to be sorted properly.


svn: r2374

src/RelImage.py

@@ -204,5 +204,5 @@ def is_pil():
 #
 #-------------------------------------------------------------------------
 def is_cnv():
-    return not os.system('which convert>/dev/null')
+    return Utils.search_for('convert')