Change project directory structure.

Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.

AUTHORS

@@ -17,7 +17,7 @@ Contributors:
 * Nick Tiskov <daymansmail@gmail.com>
 
 Code from other projects:
-* files src/qtsingleapp/* src/lineedit/*
+* files src/qtsingleapplication/* src/lineedit/*
   copyright: Nokia Corporation
   license: LGPL
 
@@ -34,7 +34,7 @@ Code from other projects:
   license: GPLv2/3
 
 Images Authors:
-* files: src/Icons/*.png
+* files: src/icons/*.png
   copyright: Gnome Icon Theme
   license: GPLv2
   url: http://ftp.acc.umu.se/pub/GNOME/sources/gnome-icon-theme
@@ -44,21 +44,21 @@ Images Authors:
   license: LGPL
   url: http://www.oxygen-icons.org
 
-* files: src/Icons/flags/*.png
+* files: src/icons/flags/*.png
   copyright: Mark James <mjames@gmail.com>
   license: Public Domain
   url: http://www.famfamfam.com
 
-* files: src/Icons/skin/*.png
+* files: src/icons/skin/*.png
   files: src/menuicons/YYxYY/*.png
   copyright: Mateusz Tobola <tobejodok@qbittorrent.org>
   license: GPLv2
 
-* file: src/Icons/skin/tabs.gif
+* file: src/icons/skin/tabs.gif
   copyright: Greg Houston <gregory.houston@gmail.com>
   license: MIT
 
-* file: src/Icons/skin/qbittorrent_mono*
+* file: src/icons/skin/qbittorrent_mono*
   copyright: Daniel Eguren <deguren@gmail.com>
   license: LGPL
 
@@ -77,12 +77,12 @@ Images Authors:
 * file: src/search_engine/engines/torrentreactor.png
   copyright: Downloaded from torrentreactor.net
 
-* file: src/Icons/oxygen/checked.png
+* file: src/icons/oxygen/checked.png
   copyright: Victor Buinsky <allok.victor@gmail.com>
 
 Translations authors:
 * files: src/lang/*.ts
-* file: src/Icons/qBittorrent.desktop
+* file: src/icons/qBittorrent.desktop
   copyright:
   - Arabic: SDERAWI (abz8868@msn.com), sn51234 (nesseyan@gmail.com) and  Ibrahim Saed ibraheem_alex(Transifex)
   - Armenian: Hrant Ohanyan (hrantohanyan@mail.am)