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

.gitignore

@@ -1,3 +1,3 @@
-*.exe
-bitcoin
-bitcoind
+src/*.exe
+src/bitcoin
+src/bitcoind

README

@@ -0,0 +1 @@
+README.md

doc/build-msw.txt

@@ -106,7 +106,7 @@ Get miniupnpc-1.5.20110215.tar.gz and copy *.h to \upnpc-exe-win32-20110215\mini
 Bitcoin
 -------
 DOS prompt:
-cd \bitcoin
+cd \bitcoin\src
 mingw32-make bitcoin.exe bitcoind.exe -f makefile.mingw
 strip bitcoin.exe
 strip bitcoind.exe

doc/build-unix.txt

@@ -13,6 +13,8 @@ UNIX BUILD NOTES
 To Build
 --------
 
+cd src/
+
 make -f makefile.unix            # Bitcoin with wxWidgets GUI
   or
 make -f makefile.unix bitcoind   # Headless bitcoin