add some examples and resources

README.md

@@ -13,6 +13,31 @@ def deps do
 end
 ```
 
+## Decoding Example
+
+create a zip file
+
+```sh
+cd /tmp
+echo test > test
+zip test.zip test
+```
+
+extract information
+
+```elixir
+{:ok, file} = :file.read_file("/tmp/test.zip")
+Dotzip.decode(file)
+```
+
+## Resources
+
+ * https://www.loc.gov/preservation/digital/formats/fdd/fdd000362.shtml
+ * https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.3.TXT
+ * https://en.wikipedia.org/wiki/ZIP_(file_format)
+
+## Notes
+
 Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
 and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
 be found at [https://hexdocs.pm/dotzip](https://hexdocs.pm/dotzip).