Add README.

README.md

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+Dialogger
+=========
+
+[![Dialogger](http://i.imgur.com/ojQbysnl.png)](http://i.imgur.com/ojQbysn.png)
+
+Dialogger is a simple dialogue graph editor. It saves your dialogue graph in
+two file formats:
+
+- **.dl** - JSON file including all visual layout information
+- **.dlz** - optimized JSON, easier and faster to parse
+
+It uses [NW.js](http://nwjs.io/) and [JointJS](http://www.jointjs.com/).
+
+Read more about the rationale
+[here](http://etodd.io/2014/05/16/the-poor-mans-dialogue-tree/).
+
+Running
+-------
+
+Binaries are provided, but if you want to hack on the project, first download
+the NW.js SDK, then:
+
+```shell
+cd /path/to/app
+/path/to/nwjs/nw .
+```
+
+See the [NW.js docs](http://docs.nwjs.io/) for more info.
+
+The MIT License
+---------------
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.