add PDF::API2 extension to Perl 5.24.0 easyconfigs + sync exts_list

{vis}[foss/2016b] OpenCV 3.1.0 (REVIEW)

{toolchain}[dummy/dummy] iomkl v2017a

fix check for Szip library in configure script for netCDF 4.1.3

{bio}[intel/2016b] BLASR v2.2

{tools}[intel/2016b] networkx v1.1

{bio}[intel/2016b] ViennaRNA v2.2.3

{numlib}[dummy/dummy] cuDNN v5.1

{bio}[intel/2016b] ea-utils v1.04.807

fix version (& homepage) in ea-utils easyconfigs

Switch to lowopt=True for libxc v2.2.* and v3.*

{devel}[*] CMake: Set CMAKE_PREFIX_PATH to ncurses install directory

Consistency across all eb files reduces the risk that this problem gets
reintroduced.

remove custom sanity_check_paths, since it's identical to that used by the R easyblock

{data}[intel/2016b] PyTables v3.2.3.1

{bio}[dummy/dummy] MEGA v7.0.20-1

{lib}[intel/2016b] Yade v2017.01a, libQGLViewer v2.6.4, minieigen v0.5.3

add sanity check command to Yade easyconfig to make sure that 'import yade' works, include bzip2 as dep

add patch for Boost v1.61-1.63 to fix problem with make_array/array_wrapper in boost serialization library