Add support of --folder paramter for cron.

Before this changes crontab from directories (except native applications) was ignored

gluon/widget.py

@@ -225,8 +225,8 @@ class web2pyDialog(object):
                       text=str(ProgramVersion + "\n" + ProgramAuthor),
                       font=('Helvetica', 11), justify=Tkinter.CENTER,
                       foreground='#195866', background=bg_color,
-                      height=3).pack( side='top', 
-                                      fill='both', 
+                      height=3).pack( side='top',
+                                      fill='both',
                                       expand='yes')
 
         self.bannerarea.after(1000, self.update_canvas)
@@ -246,7 +246,7 @@ class web2pyDialog(object):
             [('0.0.0.0', 'Public')]
         for ip, legend in ips:
             self.ips[ip] = Tkinter.Radiobutton(
-                self.root, bg=bg_color, highlightthickness=0, 
+                self.root, bg=bg_color, highlightthickness=0,
                 selectcolor='light grey', width=30,
                 anchor=Tkinter.W, text='%s (%s)' % (legend, ip),
                 justify=Tkinter.LEFT,
@@ -1119,6 +1119,8 @@ def start(cron=True):
 
     # ## if -S start interactive shell (also no cron)
     if options.shell:
+        if options.folder:
+            os.chdir(options.folder)
         if not options.args is None:
             sys.argv[:] = options.args
         run(options.shell, plain=options.plain, bpython=options.bpython,