Update BFAST to use goolf-1.7.20

This updates to using a newer GCC 4.8.4 via goolf-1.7.20 in order to avoid a build
failure for GCC 4.7.2 in goolf-1.4.10.  The build failes  due to a texinfo parsing
bug in GCC documentation files.

This problem appears on systems like CentOS 7 due to stricter parsing in newer
versions of texinfo (5+) supplied by the system environment.

See the bug report for GCC 4.7.2 and patch description

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52903

{vis}[gimkl/2.11.5] PyFFmpeg 2.1beta (REVIEW)

minor style fixes in Python/libsodium easyconfigs

New EasyConfig for libsodium 1.0.8 with the foss-2015a toolchain

New EasyConfig for Python 2.7.11 with the foss-2015a toolchain

New EasyConfig for util-linux-2.27.1 with the foss-2015a toolchain

New EasyConfig for flex 2.6.0 with the GCC 4.9.2 compiler

use flex easyblock

add bitstring extension

style fixes in x easyconfigs

style fixes in t, u, v easyconfigs

Style fixes with autopep8: s

{vis}[intel/2016a] PyFFmpeg 2.1beta + FFmpeg 0.10.16 (REVIEW)

Add support for BioPerl in Velvet so VelvetOptimizer can use it.

consistently use %(perlver)s

Style fixes with autopep8: r

style fixes in p easyconfigs

Perl needs to be a dep so perlver is introduced as a variable where we can use
%(perlver)s

Updated CUDA easyconfig

style fixes in o easyconfigs

style fixes in n easyconfigs