release EasyBuild v3.4.1

bump version to 3.4.1 + update release notes

{lang}[intel/2017b] Python v3.6.3

{chem,math}[intel/2017b] CatMAP v20170927, ASE v3.15.0, MPFR v3.1.6, MPC 1.0.3

add -lssp to $LDFLAGS to work around 'undefined symbol: __stack_chk_guard' problem if glibc-sttic is not installed

{bio}[dummy/] OMA v2.1.1

{tools}[intel/2017b] QEMU v2.10.1

{devel}[GCCcore/6.4.0] CMake v3.9.4

{vis}[GCCcore/6.4.0,intel/2017b] matplotlib v2.1.0, freetype v2.8.1

{bio}[intel/2017b] SAMtools v1.6

include NLopt as a dependency in R easyconfigs that include nloptr as extension

adding easyconfigs: CatMAP-20170927-intel-2017b-Python-2.7.14.eb, ASE-3.15.0-intel-2017b-Python-2.7.14.eb, MPFR-3.1.6-GCCcore-6.4.0.eb, MPC-1.0.3-intel-2017b-MPFR-3.1.6.eb

{bio}[intel/2017a] HTSeq 0.9.1 (REVIEW)

disable optarch for libjpeg-turbo 1.5.1 built with intel/2017a

update $R_LIBS in plotly easyconfig