added readme and changelog

Changelog.md

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+# Goldfish Changelog
+
+## 0.1.0 (2014-10-24)
+
+- Initial release

README.md

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-# goldfish
+# Goldfish
+
+A personal wiki / notes blend inspired by Evernote and gollum, based on git.
+
+## Features
+
+- Just files on your disk. Actually, a git repo on your disk.
+- A server and a web-frontend, all in a single executable. The server manages files, your browser displays them.
+- Files are markdown with some extensions:
+  - LaTeX `$$\latex$$` or, if you want it on its own line, `\[ \latex \]`)
+  - Easier links `[[foo]]`, also works for images `[[foo.png]]`
+- If you change files on disk, they are automagically committed and updated in your browser.
+
+Future features:
+
+- Search
+- Auto-push
+- Linux / Windows support
+
+## Screenshot time!
+
+![](screen.png)
+
+Code for the page:
+
+```markdown
+# Demo Page
+
+## Markdown
+
+Things you can do:
+
+- Make _important_ notes
+- Write in __strong__ letters
+
+## Equations
+
+Both $$e^\text{inline}$$ and in display mode:
+
+\[
+  e^{i \pi} = -1
+\]
+
+## Images
+
+[[fish.png]]
+
+```