Import Upstream version 2.7.18

Demo/embed/README

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+This directory show how to embed the Python interpreter in your own
+application.  The file demo.c shows you all that is needed in your C
+code.
+
+To build it, you may have to edit the Makefile:
+
+1) set blddir to the directory where you built Python, if it isn't in
+the source directory (../..)
+
+2) change the variables that together define the list of libraries
+(MODLIBS, LIBS, SYSLIBS) to link with, to match their definitions in
+$(blddir)/Modules/Makefile
+
+An additional test program, loop.c, is used to experiment with memory
+leakage caused by repeated initialization and finalization of the
+interpreter.  It can be build by saying "make loop" and tested with
+"make looptest".  Command line usage is "./loop <python-command>",
+e.g. "./loop 'print 2+2'" should spit out an endless number of lines
+containing the number 4.