add easyconfig for ROOT v5.30.06 with goolf toolchain

{data}[intel/2016a] dask v0.8.2 w/ Python 2.7.11 & 3.5.1

add XZ as dependency in Python 3.5.1 easyconfigs, required for lzma

{tools}[intel/2016a] worker v1.6.4

fix Perl dependency in worker, it required non-standard Perl modules

{lang}[intel/2015a] Perl v5.20.3

fix bitstring 3.1.3 download URL