Fix remaining mentions of VARNISHSRCDIR

VARNISHSRCDIR is now called VARNISHSRC, but there were some mentions of the former still.
Merge pull request #7 from gnoronha/master

Readme still mentions VARNISHSRCDIR
Update copyright notice, whitespace fixes
Merge branch 'master' of github.com:varnish/libvmod-header
Fix up package name
Drop autogen.sh
Fix up disting of docs and use macros for directories
Drop obsolete bits of packaging
Correct package name
Use AC_CONFIG_HEADERS rather than the deprecated AM_CONFIG_HEADER
Use AM_CPPFLAGS instead of INCLUDES; new name
Fix merge conflict.