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/go-previous-small.xpm

@@ -0,0 +1,120 @@
+/* XPM */
+static const char *go_previous_small[] = {
+/* columns rows colors chars-per-pixel */
+"16 16 98 2",
+"   c #3A7304",
+".  c #3A7404",
+"X  c #3B7404",
+"o  c #3B7504",
+"O  c #3A7405",
+"+  c #3B7604",
+"@  c #3C7604",
+"#  c #3D7904",
+"$  c #3F790A",
+"%  c #41790E",
+"&  c #437A10",
+"*  c #457C13",
+"=  c #4E9A06",
+"-  c #519E07",
+";  c #4D8419",
+":  c #52891E",
+">  c #55A409",
+",  c #56A609",
+"<  c #58A90A",
+"1  c #59AC0B",
+"2  c #5AAD0B",
+"3  c #5CAD0E",
+"4  c #5EB30D",
+"5  c #5EA31D",
+"6  c #60B50D",
+"7  c #61B60E",
+"8  c #61B70E",
+"9  c #62AF17",
+"0  c #65B519",
+"q  c #578927",
+"w  c #598B29",
+"e  c #5A8C2C",
+"r  c #5D8D2E",
+"t  c #60A420",
+"y  c #66AF20",
+"u  c #66AC22",
+"i  c #65A827",
+"p  c #68A92B",
+"a  c #6BA236",
+"s  c #6EA23D",
+"d  c #70AD35",
+"f  c #71B035",
+"g  c #75B23C",
+"h  c #67C111",
+"j  c #69C211",
+"k  c #6EC915",
+"l  c #7CC833",
+"z  c #7BB642",
+"x  c #7AB742",
+"c  c #7FB947",
+"v  c #7DB549",
+"b  c #7DA855",
+"n  c #7FA956",
+"m  c #80B64D",
+"M  c #82B74F",
+"N  c #85B954",
+"B  c #87BB54",
+"V  c #87BA57",
+"C  c #87B65B",
+"Z  c #88BB58",
+"A  c #89BC59",
+"S  c #8ABC5A",
+"D  c #8BBD5C",
+"F  c #90BF63",
+"G  c #97BD72",
+"H  c #8DC459",
+"J  c #97DA54",
+"K  c #91C064",
+"L  c #96CA65",
+"P  c #94C26A",
+"I  c #9DC477",
+"U  c #A5DC6E",
+"Y  c #A0C37E",
+"T  c #A3CA7E",
+"R  c #A6CF7F",
+"E  c #A3D572",
+"W  c #A5D576",
+"Q  c #A9D77D",
+"!  c #A5C982",
+"~  c #A7CD84",
+"^  c #AACF88",
+"/  c #A9D480",
+"(  c #ACD881",
+")  c #AEDB82",
+"_  c #B0DE83",
+"`  c #B3D296",
+"'  c #B5D497",
+"]  c #B8D69B",
+"[  c #BDD9A3",
+"{  c #BFDAA6",
+"}  c #C2DCAA",
+"|  c #C4DDAC",
+" . c #C5DEAE",
+".. c #C6DEAE",
+"X. c #C7DFB1",
+"o. c #C8DFB1",
+"O. c #CAE0B5",
+"+. c None",
+/* pixels */
+"+.+.+.+.+.+.+.+.+.+.O +.+.+.+.+.",
+"+.+.+.+.+.+.+.+.o w   +.+.+.+.+.",
+"+.+.+.+.+.+.+.  n o.  +.+.+.+.+.",
+"+.+.+.+.+.+.& Y [ o.  +.+.+.+.+.",
+"+.+.+.+.o r ` ^ F o.    O       ",
+"+.+.+.o b ' P V D | | X.X.| }   ",
+"+.+.* G ~ m v M V V C S Z V }   ",
+"o e ! F d g z c x d i 5 9 p ]   ",
+"@ q Y B i 0 9 3 2 < , - = = !   ",
+"+.+.% C L 0 8 8 8 4 2 , - = T   ",
+"+.+.+.O s W l j h ) ( / R T T   ",
+"+.+.+.+.O : E J k _ #           ",
+"+.+.+.+.+.+.$ H U _   +.+.+.+.+.",
+"+.+.+.+.+.+.+.O a Q   +.+.+.+.+.",
+"+.+.+.+.+.+.+.+.o ;   +.+.+.+.+.",
+"+.+.+.+.+.+.+.+.+.+.o +.+.+.+.+."
+};