tiny style fix in PCRE easyconfig

{bio}[dummy] PPfold 3.1.1 w/ Java 1.8.0_66 (REVIEW)

also copy 'ext', set $PATH and $PYTHONPATH correctly for Stampy

{math}[intel/2015b] numpy 1.10.1 (REVIEW)

{bio}[intel/2015b] Stampy 1.0.28 (REVIEW)

{bio} [intel-2015a] MIGRATE-N 3.6.11 (REVIEW)

{lib}[foss/2015a] GlobalArrays 5.4b (REVIEW)

{data} [intel-2015b] scikit-learn 0.17 Python-{2.7.10,3.5.0} (REVIEW)

{vis} [intel-2015b] matplotlib 1.5.0 Python-{2.7.10,3.5.0} (REVIEW)

{bio}[intel/2015b] kallisto 0.42.4 (REVIEW)

{bio}[intel/2015b] sleuth 0.28.0 w/ R 3.2.1

add tidyr to R 3.2.1 easyconfigs

{lib}[intel/2015b] GeoIP 1.3.2 w/ Python 2.7.10 (REVIEW)

{data}[intel/2015b] HDF5 1.8.16 (REVIEW)

{bio}[intel/2015b] TopHat 2.1.0 (REVIEW)

{vis}[intel/2015b] vincent 0.4.4 w/ Python 2.7.10 (REVIEW)

add CMake as missing build dep for MultiNest

{devel}[intel/2015b] CMake 3.4.0 (REVIEW)