RChrHill

Adds modules for computing QED Disconnected diagrams. New modules: - MContraction::QEDBurgerLong - MContraction::QEDBurgerShort - MContraction::QEDSpecs - MContraction::QEDTadpole - MContraction::SplitEvenLoop - MGauge::ExactQedL - MUtilities::MulGamma - MUtilities::CShift

Fixes a bug in EignePackLCCompress where the original fine eigenvectors were saved to an LC EigenPack instead of the block-orthogonalised basis vectors constructed from the fine eigenvectors.

Edits the configure.ac to report what value CXX takes when it disagrees with: - The grid-config CXX for Hadrons configure.ac - -The hadrons-config CXX for the Hadrons Application Template configure.ac

The Sp(4) implementation of `ProjectOnGeneralGroup` currently cannot be instantiated for `vComplexF` due to being hardcoded to use a `vComplexD` SIMD type. This pull request permits a template instantiation for e.g....