New Save, Save As and Reload File icons for the Tango theme

With big thanks to Lapo Calamandrei for his willingness to relicense his Save and Save As icons.

Copyrights:
icon-themes/tango/cmd/[l,s]c_reload.png and icon-themes/tango/res/[l,s]c05508.png are from the Public Domain Tango artwork available under tango.freedesktop.org/releases/tango-icon-theme-0.8.90.tar.gz

icon-themes/tango/cmd/lc_save.svg
icon-themes/tango/cmd/[l,s]c_save.png,
icon-themes/tango/cmd/[l,s]c_saveas.png,
icon-themes/tango/cmd/[l,s]c_savebasicas.png,
icon-themes/tango/res/[l,s]c05502.png,
icon-themes/tango/res/[l,s]c05505.png are
(C) Lapo Calamandrei, as available from http://git.gnome.org/browse/gnome-icon-theme/, relicensed to LGPL3+/MPL