Update contrib/debian/ for 0.5.0 release and fix copyright file.

contrib/debian/changelog

@@ -1,3 +1,15 @@
+bitcoin (0.5.0-natty0) natty; urgency=low
+
+  * New upstream release.
+
+ -- Matt Corallo <matt@bluematt.me>  Mon, 21 Nov 2011 11:32:00 -0500
+
+bitcoin (0.5.0~rc7-natty0) natty; urgency=low
+
+  * New upstream release candidate.
+
+ -- Matt Corallo <matt@bluematt.me>  Sun, 20 Nov 2011 17:08:00 -0500
+
 bitcoin (0.5.0~rc3-natty0) natty; urgency=low
 
   * New upstream release candidate.

contrib/debian/copyright

@@ -31,7 +31,7 @@ License: GPL-3+
 Files: src/qt/res/icons/clock*.png, src/qt/res/icons/tx*.png,
        src/qt/res/src/*.svg
 Copyright: Wladimir van der Laan
-License: MIT
+License: Expat
 
 Files: src/qt/res/icons/address-book.png, src/qt/res/icons/export.png,
        src/qt/res/icons/history.png, src/qt/res/icons/key.png,
@@ -163,24 +163,5 @@ Comment:
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-License: MIT
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
- .
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
- .
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- THE SOFTWARE.
-
 License: PUB-DOM
  This work is in the public domain.