[Dillo-dev] [patch]: fix VPATH builds

Currently src/Makefile.am adds -I.. to some compile flags so that all the #include statements work. This breaks when the build directory is different from the source directory. The right thing to do is add -I$(srcdir)/.. . Patch attached (with an extra tidy-up patch as a bonus). Tested both when building in the source directory and outside it. Regards, Jeremy Henty