Add caveat for GLPK-4.52 and Octave-3.6.4

https://bugs.archlinux.org/task/36835
> Octave cannot use the current version of GLPK, its API has apparently changed.

Closes #512.
Updated sha1 for netcdf-4.3.0.tar.gz

Closes #514.
gmap-gsnap 2013-11-23
armadillo: added C++11 option

Closes #507.
ViennaRNA 2.1.5

Closes #516.
osgEarth: 2.5, 3D Earth engine built upon Open Scene Graph