Update changelog for 3.5.0

debian/changelog

-dump1090-fa (3.5.0~dev) UNRELEASED; urgency=medium
+dump1090-fa (3.5.0) stable; urgency=medium
 
-  * in development
+  * SkyView map UI added.
+  * Only enable lighttpd config once, not on every package upgrade in case the
+    user has deliberately disabled it.
+  * Fix AGC gain setting.
+  * Updated the FlightAware aircraft data export.
+  * Minor bugfixes.
 
- -- Oliver Jowett <oliver@mutability.co.uk>  Wed, 22 Mar 2017 11:31:27 +0000
+ -- Oliver Jowett <oliver@mutability.co.uk>  Mon, 03 Apr 2017 17:53:48 +0100
 
 dump1090-fa (3.4.0) stable; urgency=medium