Add a README for contributors

README

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+Organisation of the source
+==========================
+
+This branch contains all the theme of Lubuntu. A prefix with 4 digits is used
+to identify the release of each items, each current items which don't have
+digits. After each release, all items are copied with the digits.
+
+When it's possible, symlink are used to link current item, with the last one with a digit.
+Example : 
+For the logout banner, the default file is usr/share/lubuntu/images/logout-banner.png
+but for 12.04 release, it's just a link to the file usr/share/lubuntu/images/1204-logout-banner.png
+
+
+
+Map of the source
+=================
+
+Icon theme (unique for all themes) : usr/share/icons/lubuntu
+GTK & Openbox theme (Lubuntu-default is the current one) : usr/share/themes
+Wallpapers (lubuntu-default-wallpaper is the current one) : usr/share/lubuntu/wallpapers
+Logout banner (logout-banner.png is the current one) : usr/share/lubuntu/images
+Menu button (lubuntu-logo.png is the current one) : usr/share/lubuntu/images
+Lxpanel background (lubuntu-background.png is the current one) : usr/share/lxpanel/images
+LXDM theme (Lubuntu is the current one) : usr/share/lxdm/themes
+
+
+
+How to propose changes
+======================
+1- Branch the main branch, by doing "bzr branch lp:~lubuntu-art/+junk/lubuntu-artwork"
+2- Do your modification, and commit by doing "bzr commit", and by writing a
+message explaining your changes. 
+3- If you need to add a file, use "bzr add the_file" before "bzr commit"
+4- You can make any numbers of commit you want. It's even better to have many
+small commits, than one big commit
+5- When it's finish, just push your branch anywhere on launchpad
+(see https://help.launchpad.net/Code/UploadingABranch)
+6- If the main is updated, you can merge the changes by doing "bzr pull lp:~lubuntu-art/+junk/lubuntu-artwork"
+If a conflict is detected, you can use "bzr merge lp:~lubuntu-art/+junk/lubuntu-artwork"
+to merge your changes.