Update GIMP to version 2.8.6

Please update GIMP to version 2.8.6 in saucy.

This will fix the following bugs:

see https://git.gnome.org/browse/gimp/plain/NEWS?h=gimp-2-8

Overview of Changes from GIMP 2.8.4 to GIMP 2.8.6
=================================================

Core:

 - Fix saving to URIs, it was broken to only allow exporting, and fix
   save/export of compressed files
 - Fix brush spacing for drawing in any direction
 - Increase the maximum size of clipboard brushes and patterns to 1024x1024
 - Make sure data objects are saved when only their name was changed

GUI:

 - Don't allow single-window docks to shrink smaller than their requisition
 - Make sure a single-window's right docks keep their size across sessions
 - Allow to change the spacing of non-generated brushes again
 - In single-window mode, make Escape move the focus to the canvas,
   and beep if the focus is already there
 - Be smarter about unavailable fonts, and don't crash
 - Make clicking the single-window's close button quit GIMP
 - Make view-close (Ctrl+W) only close image windows and tabs, not docks

Libgimp:

 - Add SIGNED_ROUND() which also rounds negative values correctly

Plug-ins:

 - Make GIMP_PLUGIN_DEBUG work again after GLib changed logging
 - Fix zealous crop for transparent borders

Installer:

 - Add Hungarian translation

Data:

 - Add a default "Color from Gradient" dynamics and tool preset

General:

 - Lots of bug fixes
 - Lots of translation updates

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gimp 2.8.4-1ubuntu1
ProcVersionSignature: Ubuntu 3.10.0-6.17-generic 3.10.3
Uname: Linux 3.10.0-6-generic x86_64
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
Date: Fri Aug 2 14:33:09 2013
InstallationDate: Installed on 2013-07-27 (6 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130727)
MarkForUpload: True
SourcePackage: gimp
UpgradeStatus: No upgrade log present (probably fresh install)