Merge branch 'graphviz_with_perl_binding' of github.com:hajgato/easybuild-easyconfigs into graphviz_with_perl_binding

sync with develop & resolve conflict

Conflicts:
	easybuild/easyconfigs/p/Perl/Perl-5.20.0-ictce-5.5.0.eb

Conflicts:
	setup.py

Doxygen-1.8.7 intel-2014b filename typo corrected

add easyconfig for EasyBuild v1.15.2

bump version to v1.15.2.0 and update release notes

add unit test to verify specified sanity_check_paths

disable parallel build for slalib

override compiler check for CUDA v5.5.22 with GCC v4.8.2

make both GCC and Clang first-case citizens in Clang-based toolchains (as opposed to using ClangGCC)

make both GCC and Clang first-case citizens in Clang-based toolchains (as opposed to using ClangGCC)

fix compatibility of gimkl with HMNS

fix compatibility of goolfc with HMNS

OpenMD

add missing deps

bump dep versions of flex/Bison/Eigen/FFTW + add intel/2014b easyconfigs

make both GCC and Clang first-case citizens in Clang-based toolchains (as opposed to using ClangGCC)