Updates README with instructions on downloading TR1 tuple without the rest of Boost.

README

@@ -52,7 +52,8 @@ package (as described below):
   * GNU-compatible Make or "gmake"
   * POSIX-standard shell
   * POSIX(-2) Regular Expressions (regex.h)
-  * gcc 4.0 or newer
+  * gcc 4.0 or newer, or gcc 3.4 or newer with the tr1 tuple library
+    (from Boost or other vendors).
 
 Furthermore, if you are building Google Mock from a VCS Checkout (also
 described below), there are further requirements:
@@ -63,11 +64,12 @@ described below), there are further requirements:
 
 ### Windows Requirements ###
   * Microsoft Visual C++ 8.0 SP1 or newer
-  * An implementation of the tr1 C++ library (You can get it for free
-    from http://www.boost.org/.  We have verified that version 1.36.0
-    works.  One caveat is this implementation exposes a bug in Visual
-    C++'s <type_info> header when exceptions are disabled.  Therefore
-    your project must enable exceptions for this configuration to work.)
+  * An implementation of the tr1 tuple C++ library (You can get it for
+    free from http://www.boost.org/.  We have verified that version
+    1.36.0 works.  One caveat is this implementation exposes a bug in
+    Visual C++'s <type_info> header when exceptions are disabled.
+    Therefore your project must enable exceptions for this
+    configuration to work.)
 
 ### Mac OS X Requirements ###
   * Mac OS X 10.4 Tiger or newer
@@ -237,6 +239,11 @@ is a header-only library, so the installation only involves unpacking
 it to a suitable location - you don't need to compile it or download a
 pre-compiled Boost binary.
 
+Since Boost is quite large, you may prefer to only install the files
+actually needed by Google Mock.  If so, you can download TR1 tuple
+without other parts of Boost from
+http://code.google.com/p/googlemock/downloads/list.
+
 After that you have two options: either set up Boost globally or
 modify the Google Mock project to point to your copy of Boost. The
 former will let all your tests use the same Boost library while the