Aside from a number of instances of const being cast away (mostly relating to the urldb, which is correct to only export const data) this now builds warning-free with GCC 4 on x86, which is nice.
svn path=/trunk/netsurf/; revision=3868
NetSurf includes are now done with ""s and other system includes with <>s as C intended.
The scandeps tool has been updated to only look for ""ed includes, and to verify that the
files exist in the tree before adding them to the dependency lines. The depend rule has
therefore been augmented to make sure the autogenerated files are built before it is run.
This is untested under self-hosted RISC OS builds. All else tested and works.
svn path=/trunk/netsurf/; revision=3307
