Add some more fork info to README

Author: bep

README.md

@@ -0,0 +1,31 @@
+
+[![Tests on Linux, MacOS and Windows](https://github.com/bep/log/workflows/Test/badge.svg)](https://github.com/bep/log/actions?query=workflow:Test)
+[![Go Report Card](https://goreportcard.com/badge/github.com/bep/log)](https://goreportcard.com/report/github.com/bep/log)
+[![GoDoc](https://godoc.org/github.com/bep/log?status.svg)](https://godoc.org/github.com/bep/log)
+
+This is a fork of the exellent [Apex Log](https://github.com/apex/log) library.
+
+Main changes:
+
+* Trim unneeded dependencies.
+* Make `Fields` into a slice to preserve log order.
+* Split `Entry` into `Entry` and `EntryFields`. This is easier to reason about and more effective (see benchmarks below)
+
+The existing benchmarks compared to the `7e0ed94172ec33f01a921811762c99e93d531cf6`:
+
+```bash
+name              old time/op    new time/op    delta
+Logger_small-10      108ns ± 0%      75ns ± 0%  -30.54%  (p=0.029 n=4+4)
+Logger_medium-10     338ns ± 0%     175ns ± 0%  -48.17%  (p=0.029 n=4+4)
+Logger_large-10     1.11µs ± 0%    0.41µs ± 0%  -62.92%  (p=0.029 n=4+4)
+
+name              old alloc/op   new alloc/op   delta
+Logger_small-10       272B ± 0%       96B ± 0%  -64.71%  (p=0.029 n=4+4)
+Logger_medium-10      904B ± 0%      312B ± 0%  -65.49%  (p=0.029 n=4+4)
+Logger_large-10     2.47kB ± 0%    1.26kB ± 0%  -49.15%  (p=0.029 n=4+4)
+
+name              old allocs/op  new allocs/op  delta
+Logger_small-10       3.00 ± 0%      2.00 ± 0%  -33.33%  (p=0.029 n=4+4)
+Logger_medium-10      7.00 ± 0%      5.00 ± 0%  -28.57%  (p=0.029 n=4+4)
+Logger_large-10       19.0 ± 0%      10.0 ± 0%  -47.37%  (p=0.029 n=4+4)
+```

Readme.md

@@ -9,7 +9,10 @@ import (
 )
 
 // assert interface compliance.
-var _ Interface = (*EntryFields)(nil)
+var (
+	_ Interface = (*EntryFields)(nil)
+	_ Interface = (*Entry)(nil)
+)
 
 // Now returns the current time.
 var Now = time.Now