fix doc

Author: make-github-pseudonymous-again

doc/manual/installation.md

@@ -1,4 +1,4 @@
-Can be managed through
+Can be managed using
 [jspm](http://jspm.io)
 or [npm](https://github.com/npm/npm).
 

doc/manual/usage.md

@@ -8,7 +8,7 @@ import 'babel-polyfill' ;
 
 Then
 ```js
-const redblacktree = require( 'aureooms-js-red-black-tree' ) ;
+const redblacktree = require( 'aureooms-es-red-black-tree' ) ;
 // or
-import redblacktree from 'aureooms-js-red-black-tree' ;
+import redblacktree from 'aureooms-es-red-black-tree' ;
 ```