add definition for intel/2016b toolchain

add definition for foss/2016b toolchain

sync foss/2016a easyconfigs for X stack with their intel/2016a equivalents

{chem} [intel/2016a] PSI4/1.0

{chem}[foss/2016a] CHARMM v37b2

Add missing build deps for X stack (REVIEW)

remove Qt 5.7.0 easyconfig

use %(pyver)s and %(pyshortver)s templates

Improved the comment on the preconfigopts.

{tools}[intel/2016a] worker v1.6.5

{data,tools}[intel/2016a] netCDF v4.4.1, cURL v7.49.1

{bio}[intel/2016a] GROMACS v5.1.2 w/ double precision

{bio}[goolf/1.7.20] GROMACS v5.1.2

{bio} [foss-2016a] GROMACS-5.1.2-foss-2016a-mt

{bio}[intel-2015b] GROMACS 5.1.1

EasyConfig for GROMACS 3.3.3 (old version with functionality that has since been removed)