added a metrics module to deal with the feature extraction. There are
a bunch of unorganized stuff inside. The idea is to split them into
more logical separate classes
added reviewTool for re-visiting post and identify scams (and legit) and
other assorted utilities (patching, removing stuff, etc.)
added and modded reviewTool (a collection of tools to manage the 2nd run scrape)
modded metrics to encapsulate all the feature array generating handlers and
functions.

small updates on scrapeTool.py
added a no post removal in the initialization
changed file name to be consistent with class name