Rewrites organization

- Create lib/rewrites.php and move everything from lib/htaccess.php
except the H5BP htaccess functionality into it

- In the config, change add_theme_support('rewrite-urls') to
add_theme_support('rewrites')

- Remove the Apache/LightSpeed HTTPD check for rewrites

- Update docs with better Nginx rewrite rules

doc/lib.md

@@ -45,7 +45,7 @@ This file contains HTML5 Boilerplate's `.htaccess` which is automatically added
 
 ### htaccess.php
 
-This file handles the clean URL rewrites and HTML5 Boilerplate `.htaccess`. [About the rewrites](rewrites.md).
+This file handles the HTML5 Boilerplate `.htaccess`.
 
 ### init.php
 
@@ -55,6 +55,10 @@ This file runs the initial theme setup and defines helper constants for later us
 
 This file contains all the custom nav modifications (for Bootstrap) and clean up.
 
+### rewrites.php
+
+This file handles the clean URL rewrites. [About the rewrites](rewrites.md).
+
 ### scripts.php
 
 This file handles all of the CSS and JavaScript.