1851 bioconductor bundle updates

{vis} [intel/2015a] Gtkmm and deps (pango, GLib, cairo, Atkmm) (REVIEW)

sync with develop

fix versions for Bioconductor pkgs rtracklayer, GenomicFeatures, VariantAnnotation

{devel}[intel/2015a] Boost 1.59.0 (REVIEW)

Rollback extending list of Python extensions to resolve IPython deps

{devel}[intel/2015a] CMake 3.3.1 (REVIEW)

fix broken test because of change in dep_graph function

fix determining whether dependency is an external module

merge IRanges version fix into branch fixing Bioconductor pkg versions

Merge remote-tracking branch 'github_verdurin/1849_ivectors_update' into 1851_bioconductor_bundle_updates

{lib}[intel/2015a] Global Arrays 5.3 (REVIEW)

This reverts commit 18e06c15.

This reverts commit e5218465.

This reverts commit 1e3d5ae4.

{vis}[intel/2015a] Graphviz 2.38.0 + pygraphviz 1.3rc2 w/ Python 2.7.10 (REVIEW)

fix conflict detection in unit tests

{bio}[goolf/1.4.10] MACS 1.4.2-1 (REVIEW)