of-dataframe: add to mxe * src/of-dataframe.mk: new file * src/of-dataframe-1-fixes.patch: new file * dist-files.mk: add of-dataframe.mk of-dataframe--fixes.patch * index.html: add of-dataframe * Makefile.am: add of-dataframe * build_packages.m: add dataframe package

#include <iostream>
#include <cpp/poppler-version.h>

int main(int argc, char *argv[])
{
    (void)argc;
    (void)argv;

    std::cout << "Poppler version: " << poppler::version_string() << std::endl;

    return 0;
}