added first skel tutorial

tutorials/ubuntu_trusty_nginx_bridge_client_certificates.md

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+Building a vpn-ws bridge server with client-certificates authentication on Ubuntu Trusty
+========================================================================================
+
+We have a lan on the subnet 192.168.173.0/24 and we want to allow VPN access from the internet.
+
+The lan has a DHCP server.
+
+One node of the lan (192.168.173.17) will be the vpn-ws server (the gateway of the lan has to be configured for allowing access to its
+https port from the world) 
+
+Clients connecting to the VPN get a 192.168.173.0/24 address from the DHCP server of the lan.
+
+Requirements
+============
+
+Ubuntu 14.04 (32 or 64 bit) on the vn-ws server
+
+Installing packages
+===================
+
+We are goinf to install packages on the system that will run the vpn-ws/nginx server
+
+You need only nginx and bridge-utils (we are going to use static binaries for vpn-ws)
+
+```sh
+sudo apt-get install nginx bridge-utils
+```
+
+Now download a vpn-ws linux binary (32 or 64 bit) from https://github.com/unbit/vpn-ws#binary-packages and place it in /usr/local/bin
+
+Network configuration
+=====================
+
+Certification authority
+=======================
+
+
+Issuing certificates
+====================
+
+Configuring nginx
+=================
+
+Starting vpn-ws on boot
+======================
+
+
+Testing a client
+================
+