Cleaning up lib-src

FileDialog goes into audacity/src/widgets and the mod-* directories go into
audacity/modules.

This leaves nothing in lib-src that isn't a 3rd-party libs or supporting
files.

modules/mod-nyq-bench/images/edit-redo-small.xpm

@@ -0,0 +1,69 @@
+/* XPM */
+static const char *edit_redo_small[] = {
+/* columns rows colors chars-per-pixel */
+"16 16 47 1",
+"  c #4E9A06",
+". c #529D0A",
+"X c #559F0C",
+"o c #5AA80F",
+"O c #73D216",
+"+ c #77D014",
+"@ c #75D318",
+"# c #8F9B0C",
+"$ c #919D05",
+"% c #9A9902",
+"& c #99A605",
+"* c #93A10B",
+"= c #AFD71A",
+"- c #9BD622",
+"; c #97DD2A",
+": c #9DC230",
+"> c #AFC723",
+", c #A1DA23",
+"< c #A0DB24",
+"1 c #A4DE24",
+"2 c #A5DF26",
+"3 c #B3D937",
+"4 c #B8DD3A",
+"5 c #8AE234",
+"6 c #BAE031",
+"7 c #C8D009",
+"8 c #CBD417",
+"9 c #CCD41E",
+"0 c #CDD624",
+"q c #C0D62C",
+"w c #D9DE23",
+"e c #A9D846",
+"r c #ACD945",
+"t c #A9DE49",
+"y c #BEE246",
+"u c #A1E950",
+"i c #A6EF61",
+"p c #AFEF67",
+"a c #B1E963",
+"s c #B1ED60",
+"d c #B2EC64",
+"f c #B1EF65",
+"g c #AEF16A",
+"h c #AEF26B",
+"j c #AEF36C",
+"k c #B3F573",
+"l c None",
+/* pixels */
+"lllllllll llllll",
+"lllllllll  lllll",
+"lllllllll j llll",
+"llllll    jj lll",
+"llll #tgjkiOj ll",
+"lll rpu11-1OOj l",
+"ll ef2;--=OOO@j ",
+"l :s2==7+@OOO5 l",
+"lXa68-,,1-w@5 ll",
+"l.f0*     95 lll",
+"l y& llll 5 llll",
+"l 3 lllll  lllll",
+"l 4 lllll llllll",
+"l >$llllllllllll",
+"lloq%lllllllllll",
+"llllllllllllllll"
+};