New HTTP modifier module
* config/replacements
  src/modules/attacks/replacer.py
  src/modules/attacks/__init__.py
  -- Added the beta of a new attack module, Replacer.  This is capable
  of modifying HTTP traffic in a pretty simplistic way.
* src/core/util.py
  -- Added the file type
Merge branch 'dev' of https://github.com/hatRiot/zarp into dev