Website: Added more project details

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+source 'https://rubygems.org'
+gem 'github-pages', group: :jekyll_plugins

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-<p>Web page coming soon</p>

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+---
+layout: default
+title: Code gathering tools
+---
+
+# Code gathering tools
+
+Code gathering tools help you clean, recover, and compare
+versions of code in computational notebooks.
+
+For instance, with code gathering tools, you can select a
+result in your notebook, and then create an entirely new
+notebook with nothing but the subset of cells, in order,
+that were used to compute it.
+
+# Installing gathering tools
+
+This command doesn't currently work, but it will soon!
+
+```
+jupyter labextension install gather
+```
+
+# Using gathering tools
+
+*TODO: Add a bunch of GIFs here. Show examples of gathering
+to notebook, gathering to cells, gathering to scripts, and
+gathering history.*
+
+# Learn More
+
+Curious about how we designed and built code gathering
+tools? Read our technical paper!
+
+**Managing Messes in Computational Notebooks**. Andrew Head,
+Fred Hohman, Titus Barik, Steven Drucker, and Robert
+DeLine. To appear at the ACM Conference on Human Factors in
+Computing Systems, CHI 2019.
+
+*A link to pre-print will be posted soon!*
+
+Replication materials for the in-lab usability study can be
+found [here (TODO)](broken link).
+
+# Questions and Answers
+
+**Will my notebook take up more storage space when I use
+this extension?**
+
+Yes, by design. To help you recover code that has been
+deleted or overwritten, your notebook will be saved with all
+lines of code you executed in it. That said, the
+storage space of this text should be small compared to the
+outputs saved in the notebook.
+
+**Will this extension make my notebook run slower?**
+
+Hopefully not. If it does, let us know by [submitting a bug
+request](https://github.com/Microsoft/gather/issues/new/choose).
+
+**The paper had a feature where you could compare versions
+of cell outputs side by side. How do I enable that?**
+
+We're hoping to add that feature back into the tool soon.
+When we do, we'll update this answer with details.
+
+**I found a bug. Can you fix it?**
+
+[Submit a bug request](https://github.com/Microsoft/gather/issues/new/choose)
+and we'll see what we can do.
+
+**This is tool [extremely / somewhat / not that] useful.**
+
+We're actively working on improving these tools to help
+analysts manage messes in their notebooks. Submit a feature
+request if you have an idea of something we should add. Or
+just send us an email telling us about how you use them.