fix partial args matching in basingGrob and imageMapGrob
fix whitespace issue in Makevars.win

under x86_64, CC='cc -m64', and so it needs quoting
trying to make proper lua version detection

try 'lua' before 'lua5.1' in pkg-config; then check for version number explicitely,
as reported in the lua.h header
sync with CRAN version
sync with CRAN version
update configure script