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/replace.py

@@ -0,0 +1,20 @@
+import re
+from netlib.http import decoded
+from plugins.plugin import Plugin
+
+class Replace(Plugin):
+    name    = 'Replace'
+    optname = 'replace'
+    desc    = 'Replace arbitrary content in HTML content'
+    version = '0.2'
+
+    def response(self, context, flow):
+        if flow.response.headers.get_first("content-type", "").startswith("text/html"):
+            with decoded(flow.response):
+                for rulename, regexs in self.config['Replace'].iteritems():
+                    for regex1,regex2 in regexs.iteritems():
+                        if re.search(regex1, flow.response.content):
+                            data = re.sub(regex1, regex2, flow.response.content)
+                            context.log("[Replace] Occurances matching '{}' replaced with '{}' according to rule '{}' on {}".format(regex1, regex2, rulename, flow.request.host))
+
+                            flow.response.content = data