Boost: find zlib on Debian based systems
fix compatibility of goolfc with HMNS
add easyconfigs for HPL with goolfc toolchain
fix compatibility of gimkl with HMNS
fix typo
make both GCC and Clang first-case citizens in Clang-based toolchains (as opposed to using ClangGCC)
bump version to v1.15.2.0dev
override compiler check for CUDA v5.5.22 with GCC v4.8.2
bump version to v1.15.2.0 and update release notes
disable parallel build for slalib
also include #968 in release notes
Merge pull request #1118 from boegel/v1.15.2

bump version to v1.15.2.0 and update release notes
Merge branch 'v1.15.x' of github.com:hpcugent/easybuild-easyconfigs into v1.15.x
Merge branch 'v1.15.x'