Log Message:
Update from version 0.14 to version 0.15.

Upstream changes:
0.15    Mon Apr 5 15:24:24 2010
        Fix tests to use the right Perl (jjore)
        Shebang for Makefile.PL (jjore)
        fix the 'repl' can't be exported bug (sunnavy)
        Use Sub::Exporter since it's irrevocably in our dep tree
            anyway (sunnavy)
        Silence warning about v-string (doy)
        Documentation fixes (Sartak)
        Passing in an explicit undef to repl will silence the
            stacktrace (Sartak)