Update README.md

Include a short description of the project, as well as information on how to use
the configurations and what Apache and browser versions are supported.

README.md

@@ -1,14 +1,68 @@
 # [Apache Server Configs](https://github.com/h5bp/server-configs-apache/)
 
-## Contributing to this project
+__Apache Server Configs__ is a collection of boilerplate configurations that
+can help your server improve the web site's performance and security, while
+also ensuring that resources are served with the correct content-type and are
+accessible, if needed, even cross-domain.
 
-Anyone and everyone is welcome to contribute. Please take a moment to review the
-[guidelines for contributing](CONTRIBUTING.md).
+## Usage
+
+If you have access to the [main server configuration
+file](http://httpd.apache.org/docs/current/configuring.html#main)
+(usually called `httpd.conf`), you should add the logic from the `.htaccess`
+file in, for example, a
+[`<Directory>`](http://httpd.apache.org/docs/current/mod/core.html#directory)
+section in the main configuration file. This is usually the recommended way, as
+using `.htaccess` files [slows
+down](http://httpd.apache.org/docs/current/howto/htaccess.html#when) Apache!
+
+If you don't have access, which is quite common with hosting services, just put
+the `.htaccess` file in the root of the website.
+
+Also note that, some configurations won't have any effect if the appropriate
+modules aren't enabled. So, in order for everything to work as intended, you
+need to ensure the you have the following Apache modules
+[enabled](https://github.com/h5bp/server-configs-apache/wiki/How-to-enable-Apache-modules):
+  * [`mod_autoindex.c` (autoindex_module)](http://httpd.apache.org/docs/current/mod/mod_autoindex.html)
+  * [`mod_deflate.c` (deflate_module)](http://httpd.apache.org/docs/current/mod/mod_deflate.html)
+  * [`mod_expires.c` (expires_module)](http://httpd.apache.org/docs/current/mod/mod_expires.html)
+  * [`mod_filter.c` (filter_module)](http://httpd.apache.org/docs/current/mod/mod_filter.html)
+  * [`mod_headers.c` (headers_module)](http://httpd.apache.org/docs/current/mod/mod_headers.html)
+  * [`mod_include.c` (include_module)](http://httpd.apache.org/docs/current/mod/mod_include.html)
+  * [`mod_mime.c` (mime_module)](http://httpd.apache.org/docs/current/mod/mod_mime.html)
+  * [`mod_rewrite.c` (rewrite_module)](http://httpd.apache.org/docs/current/mod/mod_rewrite.html)
+  * [`mod_setenvif.c` (setenvif_module)](http://httpd.apache.org/docs/current/mod/mod_setenvif.html)
+
+For more detailed information on configuration files and how to use them, please
+check the appropriate Apache documentation:
+
+* http://httpd.apache.org/docs/current/configuring.html
+* http://httpd.apache.org/docs/current/howto/htaccess.html
+
+
+## Support
+
+* #### __Apache v2.2.0+__
+
+* #### __Browsers:__
+
+  * Chrome
+  * Firefox 4+
+  * Internet Explorer 8+
+  * Opera 12+
+  * Safari 5+
+
+
+## Contributing
+
+Anyone and everyone is welcome to contribute, but before you do, please take a
+moment to review the [guidelines](CONTRIBUTING.md).
 
 * [Bug reports](CONTRIBUTING.md#bugs)
 * [Feature requests](CONTRIBUTING.md#features)
 * [Pull requests](CONTRIBUTING.md#pull-requests)
 
+
 ## Acknowledgements
 
 [Apache Server Configs](https://github.com/h5bp/server-configs-apache/) is
@@ -21,6 +75,7 @@ This project is currently maintained by:
 |:---:|:---:|
 | [Cătălin Mariș](http://twitter.com/alrra) |
 
+
 ## License
 
 [Apache Server Configs](https://github.com/h5bp/server-configs-apache/) is