Add readme

README.md

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+Sets up tinc as a mesh network. It will setup all ip addresses and setup hosts file entries. For instance, if tinc_netname is mesh, all the nodes will have entries host1.mesh, host2.mesh, etc. Also, for a private mesh, you can specify multiple entries of tinc_connectto.
+
+Requirements: 
+
+python-netaddr must be installed
+
+Runit must be installed either manually or through a package or precompiled binaries: 
+https://github.com/tjheeta/ansible-runit-role
+
+Variables:
+
+```
+tinc_netname: mesh               # what the domainname that hostsfile will refer to
+tinc_connectto:                  # what public hosts that can be connected to
+   publichost1: 1.2.3.4
+   publichost2: 1.2.3.5
+tinc_subnet: 10.11.0.0/24        # what public hosts that can be connected to
+tinc_port: 2005                  # tinc port
+tinc_state: present              # whether this mesh name is present or not
+tinc_static_binary: true         # whether to use the included binaries
+```
+