add boost C++ installation instructions

change_log.txt

@@ -4,7 +4,14 @@ Started 2007-June-11
 Please add newer entries at the top, list the date and your name with
 email address.
 
-2007-Dec-16 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
+
+2008-Jan-18 UPDATE   Dick Hollenbeck <dick@softplc.com>
+================================================================================
+    how-to-build-kicad.txt: added the Boost C++ Libraries installation info
+    and requirement.
+
+
+2008-Jan-16 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
 ================================================================================
 +pcbnew:
     Move Zone outlines added
@@ -12,14 +19,14 @@ email address.
     some bugs solved, but polyline.cpp still needs work.
     gendrill: code cleaning.
 
-2007-Dec-14 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
+2008-Jan-14 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
 ================================================================================
 +pcbnew:
     code cleaning:
      DRAWSEGMENT class functions moved in the new files class_drawsegment.cpp et .h
 
 
-2007-Dec-12 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
+2008-Jan-12 UPDATE  Jean-Pierre Charras <jean-pierre.charras@inpg.fr>
 ================================================================================
 +eeschema:
     missing footprints in export netlist (bug 1867321)