Import Powershell libs and modules (again)

Add Rex powershell parser:
 reads PSH, determines functions, variables, blocks
 compresses and cleans up the code it's read, obfuscates
 handles string literals and reserved variable names
 extracts code blocks and functions for reuse
  turns powersploit into a useful sub-component for MSF
Rewire Msf powershell modules
 Make use of Rex parser
 Handles payload generation, substituions
 Brings convenience methods - byte array generation and download
 Re-add .NET compiler
  Compiles .NET code (C#/VB.NET) in memory
  Can generate binary output file (dynamic persistence)
  Handles code-signing (steal cert with mimikatz, sign your bin)
  Not detected by AV (still...)
 Update payload generation
  GZip compression and decompression (see Rex module as well)
  msftidy violations for space efficiency - each char counts
Re-submit psexec-psh
 Makes use of updated Msf and Rex modules
 Runs shellcode in-memory (in a hidden PSH window)
 Completely bypasses all AVs tested for the last year...