Add readme

README.md

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+# Side By Side
+
+Visual comparison of different translations of itemized texts; e.g. poems, bibles, etc.
+
+## Usage
+
+*TODO: Include info on middlemanless usage.*
+
+## Development
+
+### Installation
+
+On Debian/Ubuntu, it goes more or less like this:
+
+    # Install ruby, bundler, and ruby dependencies
+    sudo apt-get install ruby
+    sudo gem install bundler
+    bundle
+
+    # Install nodejs and javascript dependencies
+    sudo apt-get install nodejs
+    npm install
+
+### Tests
+
+Start middleman with `middleman`, point your browser at `http://0.0.0.0:4567/tests.html`.