implement backwards iterator - fixes #238

Automated merge

rename test directory to avoid name clash with Makefile target

fix README showing how tests were run in the automake era

fix last change of mul overflow builtin breaking non-windows compilations

fix code not compiling under windows+mingw

fix wrong types for umul overflow builtins

remove too platform dependent printf tests

implement swap function for list elements - fixes #218

add pointer swap utility

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mercurial