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

functions.php

@@ -12,7 +12,8 @@ require_once locate_template('/lib/config.php');          // Configuration
 require_once locate_template('/lib/activation.php');      // Theme activation
 require_once locate_template('/lib/cleanup.php');         // Cleanup
 require_once locate_template('/lib/nav.php');             // Custom nav modifications
-require_once locate_template('/lib/htaccess.php');        // Rewrites for assets, H5BP .htaccess
+require_once locate_template('/lib/rewrites.php');        // URL rewriting for assets
+require_once locate_template('/lib/htaccess.php');        // HTML5 Boilerplate .htaccess
 require_once locate_template('/lib/widgets.php');         // Sidebars and widgets
 require_once locate_template('/lib/scripts.php');         // Scripts and stylesheets
 require_once locate_template('/lib/custom.php');          // Custom functions