update README [ci skip]

Author: ctalkington

README.md

@@ -52,7 +52,7 @@ archive.append(null, { name:'dir/' });
 
 #### bulk(mappings)
 
-Appends multiple entries from passed array of src-dest mappings. A lazystream wrapper is used to prevent issues with open file limits.
+Appends multiple entries from passed array of src-dest mappings. A [lazystream](https://github.com/jpommerening/node-lazystream) wrapper is used to prevent issues with open file limits.
 
 Globbing patterns are supported through use of the [file-utils](https://github.com/SBoudrias/file-utils) package. Please note that multiple src files to single dest file (ie concat) is not supported.
 
@@ -69,7 +69,7 @@ For more detail on this feature, please see [BULK.md](https://github.com/ctalkin
 
 #### file(filepath, data)
 
-Appends a file given its filepath using a lazystream wrapper to prevent issues with open file limits. When the instance has received, processed, and emitted the file, the `entry` event is fired.
+Appends a file given its filepath using a [lazystream](https://github.com/jpommerening/node-lazystream) wrapper to prevent issues with open file limits. When the instance has received, processed, and emitted the file, the `entry` event is fired.
 
 ```js
 archive.file('mydir/file.txt', { name:'file.txt' });