Update to 0.9.96.

Update to 0.9.96.

Viking 0.9.96 (2010-10-11)
New features since 0.9.95
* Use ETag to detect fresh tiles on servers
* Add new menu entry in GPS Layer to delete the realtime information.
* Ensure GPS realtime information deleted when GPS Layer -->Empty All is called.
* Prevent zoom factor string displaying unnecessary .0s when it's a whole number.
* Improve Track Properties speed profile display for low speed difference (e.g. walking) tracks.
* Use speed units in display of Track/Waypoint layer draw by velocity config values, but maintain units as metres per second when read from/saved to files.
* Add keyboard accelerators for as many as possible View Menu entries.
* Simplify zoom status when xmpp and ympp are equal
* Use height units in the altitude readout for the cursor position on the status bar.
* Use height units in display of DEM min / max elevation values, but maintain units as metres when read from/saved to files.

Fixes since 0.9.95
* Fix many memory leaks
* DEM layer properties tidy up.
* Prevent getting stuck in a near infinite loop when using Coord layer, UTM mode and zoomed out to see the whole world.
* Prevent lock up in attempt to download maps along a track in UTM mode.
* Launchpad Bug #445374: Prevent crash when downloading maps along a track, with Terraserver maps when in Mercator mode.
* Add explicit linking against libz and libm
* Fix SF#3009431: Prevent Crash in Real Time Tracking GPS Mode & Autodownload Maps.
* Fix display of rounded speed units scale markers in the speed profile.
* Fix cycle map URL
* Fix compiler warnings
* Fix Track Draw by Velocity mode, so that individual track points are coloured (as was the intention).
* Fix bug where older file was removed when network not present
* Fix: warning 'draw-mode' message does not display
* Fix incorrect limitation on source map id