version up : R 3.1.2.

also use our own libraries more.
clean up rpy2 component.

component/r-language/buildout.cfg

 [buildout]
 extends =
-  ../readline/buildout.cfg
+  ../bzip2/buildout.cfg
   ../gcc/buildout.cfg
+  ../pcre/buildout.cfg
+  ../readline/buildout.cfg
+  ../xz-utils/buildout.cfg
+  ../zlib/buildout.cfg
 
 parts =
   gcc-fortran
@@ -9,14 +13,23 @@ parts =
 
 [r-language]
 recipe = slapos.recipe.cmmi
-url = http://cran.irsn.fr/src/base/R-3/R-3.1.0.tar.gz
-md5sum = a1ee52446bee81820409661e6d114ab1
+url = http://cran.irsn.fr/src/base/R-3/R-3.1.2.tar.gz
+md5sum = 3af29ec06704cbd08d4ba8d69250ae74
 configure-options =
-  --with-readline=yes
-  --with-x=no
   --enable-R-shlib
+  --with-readline=yes
+  --without-tcltk
+  --without-cairo
+  --without-libpng
+  --without-jpeglib
+  --without-libtiff
+  --with-system-zlib
+  --with-system-bzlib
+  --with-system-pcre
+  --with-system-xz
+  --without-ICU
+  --without-x
 environment =
-  CC=${gcc-fortran:location}/bin/gcc
-  F77=${gcc-fortran:location}/bin/gfortran
-  CFLAGS=-I${readline:location}/include -I${ncurses:location}/include
-  LDFLAGS=-L${gcc-fortran:location}/lib64 -Wl,-rpath=${gcc-fortran:location}/lib64 -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${ncurses:location}/lib/ -Wl,-rpath=${ncurses:location}/lib/
+  PATH=${gcc-fortran:location}/bin:%(PATH)s
+  CPPFLAGS=-I${bzip2:location}/include  -I${pcre:location}/include -I${readline5:location}/include -I${ncurses:location}/include -I${xz-utils:location}/include -I${zlib:location}/include
+  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${gcc-fortran:location}/lib -Wl,-rpath=${gcc-fortran:location}/lib -L${gcc-fortran:location}/lib64 -Wl,-rpath=${gcc-fortran:location}/lib64 -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${pcre:location}/lib -Wl,-rpath=${pcre:location}/lib -L${readline5:location}/lib -Wl,-rpath=${readline5:location}/lib -L${xz-utils:location}/lib -Wl,-rpath=${xz-utils:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib

component/rpy2/buildout.cfg

 [buildout]
 extends =
   ../gcc/buildout.cfg
+  ../pcre/buildout.cfg
   ../r-language/buildout.cfg
+  ../xz-utils/buildout.cfg
 
 # rpy2 needs R in $PATH
 # to use rpy2 you need a wrapper that sets ${r-language:location}/bin in PATH
 # see ../manpy/buildout.cfg as an example
 
 [rpy2_env]
-PATH = ${gcc-fortran:location}/bin:${r-language:location}/bin/:%(PATH)s
-CFLAGS = -I${readline:location}/include
-LDFLAGS = -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${r-language:location}/lib/R/lib -Wl,-rpath=${r-language:location}/lib/R/lib
+PATH = ${gcc-fortran:location}/bin:${r-language:location}/bin:%(PATH)s
 
 [rpy2]
 recipe = zc.recipe.egg:custom
@@ -23,3 +23,8 @@ initialization =
 rpath =
   ${gcc-fortran:location}/lib
   ${gcc-fortran:location}/lib64
+  ${pcre:location}/lib
+  ${xz-utils:location}/lib
+library-dirs =
+  ${pcre:location}/lib
+  ${xz-utils:location}/lib