bump:(github.com/armon/circbuf):bbbad097214e2918d8543d5201d12bfd7bca254d

vendor/github.com/armon/circbuf/README.md

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+circbuf
+=======
+
+This repository provides the `circbuf` package. This provides a `Buffer` object
+which is a circular (or ring) buffer. It has a fixed size, but can be written
+to infinitely. Only the last `size` bytes are ever retained. The buffer implements
+the `io.Writer` interface.
+
+Documentation
+=============
+
+Full documentation can be found on [Godoc](http://godoc.org/github.com/armon/circbuf)
+
+Usage
+=====
+
+The `circbuf` package is very easy to use:
+
+```go
+buf, _ := NewBuffer(6)
+buf.Write([]byte("hello world"))
+
+if string(buf.Bytes()) != " world" {
+    panic("should only have last 6 bytes!")
+}
+
+```
+