Added README

.gitignore

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+/target
+**/*.rs.bk
+Cargo.lock
+example/target/
+*.so
+*.a

README.md

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+# Telegraf Rust Plugin
+
+Allowing you to write telegraf plugins in Rust.
+
+## Adding to a project
+
+Copy `makefile-template.toml` and `lib.go` from this project into the root of
+your project directory.
+
+Edit the `makefile-template.toml` script, specifically the location of where
+your static library is built. Make sure to change your project to build a static
+library with `crate_type = ["staticlib"]` in your `Cargo.toml`!
+
+## How this works
+
+Using some glue Go code a ["go plugin" ](https://golang.org/pkg/plugin/)
+is generated to be used in telegraf. Rust talks to the Go using C FFI and is
+statically linked into the resulting dynamic library.
+
+A cargo make script is necessary because `go` needs to build the final artifact.
+It generates magic in its `.so` that allows other Go code to load it at runtime.