directory re-organization (keeps the old build system)

there is no internal modification of any file in this commit

files are moved into directories according to established standards in
sourcecode distribution; these directories contain:

 src - Files that are used in constructing the executable binaries,
       but are not installed.

 doc - Files in HTML and text format that document usage, quirks of
       the implementation, and contributor checklists.

 locale - Files that contain human language translation of strings
          used in the program

 contrib - Files contributed from distributions or other third party
 	   implementing scripts and auxiliary programs

src/xpm/bitcoin20.xpm

@@ -0,0 +1,160 @@
+/* XPM */
+static const char * bitcoin20_xpm[] = {
+/* columns rows colors chars-per-pixel */
+"20 20 134 2",
+"   c #735305",
+".  c #785706",
+"X  c #7E5C07",
+"o  c #755509",
+"O  c #76580D",
+"+  c #7F6015",
+"@  c #85620D",
+"#  c #89650D",
+"$  c #836215",
+"%  c #886510",
+"&  c #8E6B11",
+"*  c #81641F",
+"=  c #906D19",
+"-  c #977116",
+";  c #96741E",
+":  c #9B761E",
+">  c #947424",
+",  c #9B7722",
+"<  c #9D7824",
+"1  c #A47F23",
+"2  c #A17D2A",
+"3  c #A58125",
+"4  c #AA8327",
+"5  c #A4832F",
+"6  c #AD862B",
+"7  c #B28B2E",
+"8  c #A58433",
+"9  c #A88637",
+"0  c #AD8932",
+"q  c #A78639",
+"w  c #A8893C",
+"e  c #B28C34",
+"r  c #B88E33",
+"t  c #B28E3A",
+"y  c #B79136",
+"u  c #BB9235",
+"i  c #BB9639",
+"p  c #C19836",
+"a  c #C29539",
+"s  c #C59C3C",
+"d  c #A88B41",
+"f  c #AF9045",
+"g  c #B49342",
+"h  c #BE9641",
+"j  c #BD9B44",
+"k  c #B29448",
+"l  c #B7994B",
+"z  c #B8994C",
+"x  c #C09946",
+"c  c #CB9E46",
+"v  c #C59D4C",
+"b  c #CFA246",
+"n  c #CBAB47",
+"m  c #CEA74A",
+"M  c #D4A749",
+"N  c #D6A94D",
+"B  c #C7A754",
+"V  c #CEA453",
+"C  c #C6AA56",
+"Z  c #CDA955",
+"A  c #CBAB5B",
+"S  c #D2AB54",
+"D  c #D2AE5E",
+"F  c #D9AE5A",
+"G  c #D7B356",
+"H  c #DDB35F",
+"J  c #DFB95A",
+"K  c #E1B554",
+"L  c #E4BA56",
+"P  c #E6BC5A",
+"I  c #E9BE5E",
+"U  c #C7AC64",
+"Y  c #CBAF64",
+"T  c #CDB166",
+"R  c #D4B364",
+"E  c #DBB463",
+"W  c #DFB867",
+"Q  c #D5B76B",
+"!  c #DFBA6F",
+"~  c #D5BB76",
+"^  c #D7BE79",
+"/  c #E3BC64",
+"(  c #E8BF64",
+")  c #E0BB68",
+"_  c #DECA7A",
+"`  c #EBC265",
+"'  c #EBC36B",
+"]  c #EFC96B",
+"[  c #F1C564",
+"{  c #F3CB6A",
+"}  c #F9CD6C",
+"|  c #FAD16C",
+" . c #E5C770",
+".. c #EEC774",
+"X. c #E6CE7E",
+"o. c #EFCE7A",
+"O. c #F1CB73",
+"+. c #F4CE7A",
+"@. c #F3D273",
+"#. c #FCD574",
+"$. c #FEDA76",
+"%. c #F5D47D",
+"&. c #FAD47B",
+"*. c #F2D97D",
+"=. c #FCDA7A",
+"-. c #DDC784",
+";. c #E1CA86",
+":. c #E4CE8B",
+">. c #ECD985",
+",. c #E7D18E",
+"<. c #F4DC84",
+"1. c #FCDC81",
+"2. c #F4DB8B",
+"3. c #FBDF8B",
+"4. c #EBD592",
+"5. c #EFDA99",
+"6. c #F1DD9C",
+"7. c #F6E081",
+"8. c #FDE484",
+"9. c #FFEA87",
+"0. c #F9E488",
+"q. c #FEE88D",
+"w. c #F9E394",
+"e. c #FFEB93",
+"r. c #FEE698",
+"t. c #FEEA9B",
+"y. c #FFF49A",
+"u. c #F7E4A4",
+"i. c #F9E5A5",
+"p. c #FCE9AA",
+"a. c #F7F0AA",
+"s. c #FEF1AE",
+"d. c #FEF6B3",
+"f. c None",
+/* pixels */
+"f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.f.",
+"f.f.f.f.f.f.f.0 y i i 0 , f.f.f.f.f.f.f.",
+"f.f.f.f.3 p P | $.| } { I p ; f.f.f.f.f.",
+"f.f.f.4 L | $.{ L K L ` =.#.` 3 $ f.f.f.",
+"f.f.6 [ $.{ M a Q 0 Q S ' %.q.*.6 o f.f.",
+"f.3 ' $.P i u r ,.< :.S +.%.0.y.*.& f.f.",
+"f.C e.%.c x T Y 6.U 5.T R @.#.0.9.n . f.",
+"f.>.t.W F A ^ p.u.~ -.p.i.C { { =.@.# f.",
+"e e.3.E H / j p.6.0 V ~ p.Y ( ` #.$.3 o ",
+"j p.2.( ( ! Z p.6.l R 6.6.t I I { #.y o ",
+"j e.1.( ! +.H i.i.-.:.i.u.R N K ` #.u   ",
+"i 9.&.( ..1.) p.6.8 j w p.p.h N ' #.7   ",
+"4 =.7.` ....Z p.6.g D T p.i.t M [ } - o ",
+"f.J =.{ ` E i.p.p.i.p.p.6.k u M } K @ o ",
+"f.7 @.@./ S z f 4.d ,.q 2 r a ( { 6   f.",
+"f.f.m @.O.( / V 4.q :.v V V O.&.G X O f.",
+"f.f.: G 1.0.+.W R D R ! 4.d.d._ #   f.f.",
+"f.f.f.2 C a.i.r.w.w.i.s.d.p.Y @   f.f.f.",
+"f.f.f.f.f.5 Z  .<.3.2.X.A > .   f.f.f.f.",
+"f.f.f.f.f.f.f.> > = # $ + f.f.f.f.f.f.f."
+};