PE32+ format not parsed

I'm trying your library but unfortunately it doesn't work for 64bit executables.

I'm testing it directly on Visual Studio cl.exe available for different platforms. But any amd64 executable doesn't show any data:

```
c:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64>d:\Upload\Firefox\libpe-master\Debug\peview.exe cl.exe
TYPE : PE32+
IMAGE BASE : 140000000
ENTRY POINT : 14000C19C ( 0000B59C )

SECTIONS ( 7 ):
.text 140001000 - 140013A00 ( rsize=76288, vsize=75885 )
.rdata 140014000 - 140026800 ( rsize=75776, vsize=75698 )
.data 140027000 - 140028E00 ( rsize=7680, vsize=25112 )
.pdata 14002E000 - 14002F400 ( rsize=5120, vsize=4704 )
.tls 140030000 - 140030200 ( rsize=512, vsize=9 )
.rsrc 140031000 - 140031800 ( rsize=2048, vsize=1772 )
.reloc 140032000 - 140032C00 ( rsize=3072, vsize=2664 )

IMPORT TABLE ( 0 ) [140025588]:

c:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64>
```

Do you have any idea what can be wrong?