Update 1.Overview.md

docs/1.Overview.md

@@ -3,7 +3,7 @@
 To create a new website, we need 3 things:
  1. Documents written in [Markdown](https://daringfireball.net/projects/markdown/)
  2. [Twig](http://twig.sensiolabs.org) templates
- 3. [PHPoole CLI](https://github.com/Narno/PHPoole) or a build script
+ 3. [PHPoole CLI](https://github.com/Narno/PHPoole) **or** a build script
 
 ## Content organization
 ```
@@ -17,9 +17,9 @@ To create a new website, we need 3 things:
 |  └─ About.md           <- A Page in the root
 ├─ layouts               <- Contains Twig templates
 |  ├─ _default           <- Contains default templates
-|  |  ├─ list.html       <- Used by a _list_ node type (ie: Section)
-|  |  └─ page.html       <- Used by the _page_ node type
-|  └─ index.html         <- Used by the _homepage_ node type
+|  |  ├─ list.html.twig  <- Used by a 'list' node type (ie: a Section)
+|  |  └─ page.html.twig  <- Used by the 'page' node type
+|  └─ index.html.twig    <- Used by the 'homepage' node type
 └─ static                <- Contains static files
    └─ robots.txt         <- A static file
 ```
@@ -31,7 +31,7 @@ Use [PHPoole](https://github.com/Narno/PHPoole) CLI and run the following comman
 $ phpoole build -s
 ```
 
-Or create a PHP script:
+**Or** create a PHP script:
 ```php
 <?php
 date_default_timezone_set('Europe/Paris');