* Add warnings for existing conflicts. New versions of QMCPACK require a compiler with C++14 support.
* QMCPACK now requires a newer release of CMake.
* Switch QMCPACK to using FFTW-api provider.
* Relax dependencies on QMCPACK +da variant.
* Add QMCPACK 3.6.0 release.
* QMCPACK compiler-CUDA conflicts.
* QMCPACK fix typo in expressing conflict.
* Conditional needed since these variables are only used when FFTW is a dependency to QMCPACK.
* QMCPACK QE variant dependency was underspecified. Must include MPI as a hard dependency on QE.
* Update QMCPACK dependencies for HDF5, CMake and Boost.
* QMCPACK clean-up, more consistent use of spec vs. self.spec.
* Add support for collective I/O variant of QMCPACK.
* Update QMCPACK conflicts for QE and PHDF5 variants.
* Use built-in install method for QMCPACK starting with 3.6.0
* QMCPACK compiler C++14 conflicts were off by one version.
* QMCPACK package needs to setup_environment method.
* In support of PR#10252, get rid of slashes in string.
* Migrate these to the CUDA package and make a seperate PR.
* In support of PR#10252, get rid of join_path for nexus.
* In support of PR#10252, work around concretizer limitation.
* In support of PR#10252, convert to conditionals to if-else clauses for compactness.
* In support of PR#10252, get rid of extra space and new line in warning messages.
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