Added retext-metaphone to plugins

Readme.md

@@ -75,14 +75,15 @@ Parses the given source and returns the (by `use`d plugins, modified) tree.
 
 ## Plugins
 
-  * [retext-ast](https://github.com/wooorm/retext-ast) — encoding and decoding between AST (JSON) and TextOM object model;
+  * [retext-ast](https://github.com/wooorm/retext-ast) — Encoding and decoding between AST (JSON) and TextOM object model;
   * [retext-content](https://github.com/wooorm/retext-content) — Append, prepend, remove, and replace content into/from Retext nodes;
   * [retext-directionality](https://github.com/wooorm/retext-directionality) — Detect the direction text is written in;
   * [retext-emoji](https://github.com/wooorm/retext-emoji) — Encode or decode [Gemojis](https://github.com/github/gemoji);
-  * [retext-porter-stemmer](https://github.com/wooorm/retext-porter-stemmer) — implementation of [the Porter stemming algorithm](http://tartarus.org/martin/PorterStemmer/);
+  * [retext-metaphone](https://github.com/wooorm/retext-metaphone) — Implementation of the Metaphone algorithm;
+  * [retext-porter-stemmer](https://github.com/wooorm/retext-porter-stemmer) — Implementation of [the Porter stemming algorithm](http://tartarus.org/martin/PorterStemmer/);
   * [retext-range](https://github.com/wooorm/retext-range) — Sequences of content within a TextOM tree between two points;
-  * [retext-smartypants](https://github.com/wooorm/retext-smartypants) — implementation of [SmartyPants](http://daringfireball.net/projects/smartypants/);
-  * [retext-visit](https://github.com/wooorm/retext-visit) — visit nodes, optionally by type;
+  * [retext-smartypants](https://github.com/wooorm/retext-smartypants) — Implementation of [SmartyPants](http://daringfireball.net/projects/smartypants/);
+  * [retext-visit](https://github.com/wooorm/retext-visit) — Visit nodes, optionally by type;
 
 ## Browser Support
 Pretty much every browser (available through browserstack) runs all retext unit tests.