0.70 development info updates
Update libpe and add 2 missing subsystems to readpe.
Thanks to Dmitry Mostovenko.
Merge branch 'mmap' of github.com:merces/pev into mmap
readpe: Add support to parse and print DllCharacteristics.
readpe: Fix a possible bug when printing COFF characteristics.
ofs2rva: Fix format specifier for uint64_t.