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-next-small.xpm

@@ -0,0 +1,122 @@
+/* XPM */
+static const char *go_next_small[] = {
+/* columns rows colors chars-per-pixel */
+"16 16 100 2",
+"   c #3A7304",
+".  c #3A7404",
+"X  c #3B7404",
+"o  c #3B7504",
+"O  c #3A7405",
+"+  c #3B7604",
+"@  c #3C7604",
+"#  c #3C7804",
+"$  c #40790A",
+"%  c #427A0E",
+"&  c #437A10",
+"*  c #467C14",
+"=  c #4E9A06",
+"-  c #4F9C06",
+";  c #4D8418",
+":  c #538B1E",
+">  c #52A007",
+",  c #54A408",
+"<  c #57A709",
+"1  c #5AAC0B",
+"2  c #5BAE0B",
+"3  c #5EB30D",
+"4  c #5FB20E",
+"5  c #61B70E",
+"6  c #62B90E",
+"7  c #64BC0F",
+"8  c #64BA11",
+"9  c #66BF10",
+"0  c #66B817",
+"q  c #6CBA1F",
+"w  c #6CBF1C",
+"e  c #568926",
+"r  c #598C2A",
+"t  c #5E8F30",
+"y  c #5F8F31",
+"u  c #68A92B",
+"i  c #6BAC2F",
+"p  c #6FBA26",
+"a  c #6AA136",
+"s  c #6EAC33",
+"d  c #71A63E",
+"f  c #74AF3B",
+"g  c #78B63D",
+"h  c #7FCB34",
+"j  c #80BE44",
+"k  c #82BE49",
+"l  c #81AB5A",
+"z  c #82AB5A",
+"x  c #85B954",
+"c  c #88BB58",
+"v  c #8BBC5B",
+"b  c #8BBB5D",
+"n  c #8BBD5C",
+"m  c #8CBE5C",
+"M  c #84C249",
+"N  c #88C44D",
+"B  c #89C350",
+"V  c #8AC255",
+"C  c #8DC655",
+"Z  c #8BC158",
+"A  c #8CC358",
+"S  c #8DC25A",
+"D  c #8DC15C",
+"F  c #92D352",
+"G  c #8FC161",
+"H  c #91C164",
+"J  c #99C46F",
+"K  c #9BCA6D",
+"L  c #9CD267",
+"P  c #9DC873",
+"I  c #9EC976",
+"U  c #9CC37A",
+"Y  c #A0D56C",
+"T  c #A3CA7E",
+"R  c #A4CC7E",
+"E  c #A5D773",
+"W  c #A6D37B",
+"Q  c #A7D17F",
+"!  c #A8DA78",
+"~  c #A4C684",
+"^  c #AACE89",
+"/  c #AAD581",
+"(  c #ABD681",
+")  c #ABD781",
+"_  c #AFD48C",
+"`  c #B1D291",
+"'  c #B7D49C",
+"]  c #B9D79C",
+"[  c #BBD99F",
+"{  c #BDD9A3",
+"}  c #C0DBA7",
+"|  c #C2DCAA",
+" . c #C3DCAB",
+".. c #C5DDAD",
+"X. c #C6DEAF",
+"o. c #C7DEB0",
+"O. c #CBE0B6",
+"+. c #CBE1B7",
+"@. c #CEE3BB",
+"#. c None",
+/* pixels */
+"#.#.#.#.#.. #.#.#.#.#.#.#.#.#.#.",
+"#.#.#.#.#.  r . #.#.#.#.#.#.#.#.",
+"#.#.#.#.#.  +.l . #.#.#.#.#.#.#.",
+"#.#.#.#.#.  @. .~ & #.#.#.#.#.#.",
+".         . +.J ` ' t . #.#.#.#.",
+"  } | ....o.o.G G P [ l . #.#.#.",
+"  { x c m v v D A V D _ U * #.#.",
+"  ] f s u s g M B N M j K ^ y @ ",
+"  T = = = > < 1 5 0 p p C I e X ",
+"  T = = = , 1 3 6 6 w L c % #.#.",
+"  T T T R Q ) 5 9 h ! d @ #.#.#.",
+".       . # ) 8 F E : @ #.#.#.#.",
+"#.#.#.#.#.. ) Y D $ #.#.#.#.#.#.",
+"#.#.#.#.#.. W a . #.#.#.#.#.#.#.",
+"#.#.#.#.#.. ; . #.#.#.#.#.#.#.#.",
+"#.#.#.#.#.@ #.#.#.#.#.#.#.#.#.#."
+};