README: update

- fix hacker's guide URL
- Merge "Files" and "Folders", rename as it's confusing when finding this file in a binary distribution
- Update description of folders

README

@@ -20,12 +20,12 @@ Support . . . . . . . . . . http://www.videolan.org/support/
 Forums  . . . . . . . . . . http://forum.videolan.org/
 Wiki  . . . . . . . . . . . http://wiki.videolan.org/
 The Developers site . . . . http://wiki.videolan.org/Developers_Corner
-VLC hacking guide . . . . . http://wiki.videolan.org/Documentation:Hacker%27s_Guide
+VLC hacking guide . . . . . http://wiki.videolan.org/Hacker_Guide
 Bugtracker  . . . . . . . . http://trac.videolan.org/vlc/
 The VideoLAN web site . . . http://www.videolan.org/
 
-Files:
-======
+Source Code Content:
+===================
 ABOUT-NLS          - Notes on the Free Translation Project.
 AUTHORS            - VLC authors.
 COPYING            - The GPL license.
@@ -34,8 +34,6 @@ NEWS               - Important modifications between the releases.
 README             - This file.
 THANKS             - VLC contributors.
 
-Folders:
-========
 bin/               - VLC binaries.
 bindings/          - libVLC bindings to other languages.
 compat/            - compatibility library for operating systems missing
@@ -48,11 +46,11 @@ extras/buildsystem - different buildsystems specific files.
 extras/contrib/    - old contrib/.
 extras/misc        - Files that don't fit in the other extras/ categories.
 extras/package     - VLC packaging specific files such as spec files.
-include/           - Include files.
+include/           - Header files.
 lib/               - libVLC source code.
 modules/           - VLC plugins and modules. Most of the code is here.
-po/                - languages related files.
-projects/          - projects that uses libVLC such as the web browsers plugin.
+po/                - VLC translations.
+projects/          - projects that uses libVLC
 share/             - Common Resources files.
-src/               - VLC and libvlc source code.
+src/               - libvlccore source code.
 test/              - testing system.