Merge pull request #366 from cstrouse/update-python

Update Python from 2.7.12 to 2.7.13

packages/python27.rb

 require 'package'
 
 class Python27 < Package
-  version '2.7.12'
-  source_url 'https://www.python.org/ftp/python/2.7.12/Python-2.7.12.tar.xz' # software source tarball url
-  source_sha1 '05360b8ade117b35e266b2004a7f1f11250c6dcd'                     # source tarball sha1 sum
+  version '2.7.13'
+  source_url 'https://www.python.org/ftp/python/2.7.13/Python-2.7.13.tar.xz' # software source tarball url
+  source_sha1 '18a8f30a0356c751b8d0ea6f76e764cab13ee046'                     # source tarball sha1 sum
 
   depends_on 'bz2'
   depends_on 'ncurses'
   depends_on 'openssl'
 
   def self.build                                                  # self.build contains commands needed to build the software from source
-    system "./configure --prefix=/usr/local CPPFLAGS=\"-I/usr/local/include -I/usr/local/include/ncurses\" LDFLAGS=\"-L/usr/local/lib\" CFLAGS=\" -fPIC\""
+    system "./configure --prefix=/usr/local CPPFLAGS=\"-I/usr/local/include -I/usr/local/include/ncurses\" LDFLAGS=\"-L/usr/local/lib\" CFLAGS=\" -fPIC\" --with-ensure-pip=install"
     system "make"                                                 # ordered chronologically
   end