GRINS now needs libMesh 0.9.2.
Fix a ton of "make check" breakage

Every test that didn't specify an error estimator (regardless of
whether the test was doing error estimation) was failing here.
Bugfixes for gcc 4.8

Not sure why g++ doesn't want to implicitly convert NULL to the
appropriate pointer type here, but since the default shared_ptr
constructor has equivalent behavior let's use that to be safe.

"make check" succeeds now.
Fixes for various gcc 4.8 compiler warnings
Sort out LDFLAGS/LIBS

This fixes compilation with Cantera on Linux for me.  It needs to be
tested on OSX before being committed just in case I regressed
something there.
Merge pull request #2 from grinsfem/warning_fixes

Fixes for various gcc 4.8 compiler warnings
Merge pull request #3 from grinsfem/linux_build_fixes

Sort out LDFLAGS/LIBS
Updated README to mention Google Group lists.
More fixes for unused variables warnings
Fix warnings in manufactured tests
Merge pull request #5 from grinsfem/warning_fixes_2

More warning fixes