Add modules/scripts for PEV

[jatrost]

https://github.com/merces/pev

We should create modules/scripts that use any of these tools that make sense based on what we're currently lacking.

PEV includes these tools:

• pehash - calculate PE file hashes
• pedis - PE disassembler
• pepack - packer detector
• pescan - search for suspicious things in PE files, including TLS callbacks
• pesec - check security features in PE files
• pestr - search for unicode and ascii strings in PE files
• readpe - show PE file headers, sections and more
• rva2ofs - convert RVA to raw file offsets
• ofs2rva - convert raw file offsets to RVA