Enable -Wall for the bytecode compiler
Move Bench.Primes benchmark to Test.Bench_Primes
Require GHC 7.8.* in ./configure
Add --with-ghc and --with-ghc-pkg arguments to ./configure
Fix configure.in
Upgrade to gtest-1.7.0
Document new configuration options
Fix build on machines without TR1
Fix ./configure script (again)

The 4th argument to AC_ARG_WITH is called when the user specifies
--without-FOO, and not when no option is given.
Move old stuff into subdirectory