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/document-save-as-small.xpm

@@ -0,0 +1,117 @@
+/* XPM */
+static const char *document_save_as_small[] = {
+/* columns rows colors chars-per-pixel */
+"16 16 95 2",
+"   c black",
+".  c #4E6A7D",
+"X  c #58787A",
+"o  c #6E706B",
+"O  c #6B716E",
+"+  c #72756B",
+"@  c #667173",
+"#  c #627075",
+"$  c #38678B",
+"%  c #3D698A",
+"&  c #3B6B8F",
+"*  c #3D6B8E",
+"=  c #3F6C8E",
+"-  c #4A6D85",
+";  c #436E88",
+":  c #4A7180",
+">  c #41749A",
+",  c #44789F",
+"<  c #547D9B",
+"1  c #6B7F88",
+"2  c #5186AF",
+"3  c #5892BD",
+"4  c #688BA0",
+"5  c #6E99B6",
+"6  c #7798B0",
+"7  c #719FBF",
+"8  c #739FC0",
+"9  c #79A7CA",
+"0  c #92A6AC",
+"q  c #95A9AF",
+"w  c #9AAEB4",
+"e  c #A2A4A1",
+"r  c #A3A4A1",
+"t  c #AEB0AD",
+"y  c #AFB0AD",
+"u  c #AEB0AE",
+"i  c #AFB0AE",
+"p  c #B7B8B6",
+"a  c #C5CBBF",
+"s  c #8FB3CE",
+"d  c #92B7D3",
+"f  c #96BBD8",
+"g  c #9EBFD9",
+"h  c #98BFDC",
+"j  c #ACBCC3",
+"k  c #9BC2DF",
+"l  c #ABC8DF",
+"z  c #ABCBE2",
+"x  c #ACCBE3",
+"c  c #B1CEE6",
+"v  c #CACFC4",
+"b  c #CED4C8",
+"n  c #C9D6DD",
+"m  c #DCDBDB",
+"M  c #DBDCDB",
+"N  c #DCDCDB",
+"B  c #DCDBDC",
+"V  c #DBDCDC",
+"C  c gainsboro",
+"Z  c #DDE1D6",
+"A  c #DFE2DE",
+"S  c #E2E6DD",
+"D  c #C1D9EB",
+"F  c #C5DBEC",
+"G  c #D5DFE5",
+"H  c #D0DFEF",
+"J  c gray89",
+"K  c #E4E4E4",
+"L  c #E9E9EA",
+"P  c #EAE9EA",
+"I  c #EBECEC",
+"U  c #ECECEC",
+"Y  c gray93",
+"T  c #EDEEED",
+"R  c #EDEDEE",
+"E  c #EDEEEE",
+"W  c #EEEEEE",
+"Q  c #EEEFEE",
+"!  c #EEEEEF",
+"~  c #EFEEEF",
+"^  c #EFEFEF",
+"/  c gray94",
+"(  c #F1F1F1",
+")  c gray95",
+"_  c #F3F3F3",
+"`  c #F3F4F3",
+"'  c #F4F4F4",
+"]  c gray97",
+"[  c #F9F9F9",
+"{  c gray98",
+"}  c #FCFBFC",
+"|  c gray99",
+" . c #FDFDFD",
+".. c gray100",
+"X. c None",
+/* pixels */
+"X.X.X.$ $ $ % . X X.X.X.X.X.X.X.",
+"X.X.X.c H F k 4 ; X.X.X.X.X.X.X.",
+"1 @ # - > , g D 2 . o o o o o o ",
+"O S ..Z n 5 $ x d 2 V  .....' o ",
+"+ ..W W A 6 $ 9 s * j W W W ` o ",
+"o { I $ $ $ $ 9 3 $ $ $ $ I _ o ",
+"o { L v $ h 7 7 7 7 f $ q L _ o ",
+"o { { J a $ h 7 7 l $ 0 J _ _ o ",
+"o { W { K a $ x h * 0 J { W _ o ",
+"o ' J W { { b = $ w { ..W J W o ",
+"o r r r r r r r r r r r r r r o ",
+"o C m N C B V B B V V   M m m o ",
+"o ! i y y y y y y y W   W W ! o ",
+"o ..p p p p p p p p ..  ......o ",
+"o ....................  ......o ",
+"o o o o o o o o o o o o o o o o "
+};