Add blacs dot example in Fortran
Add ITK recipe.
Add TCLAP recipe.
Started vxl recipe.

Abandonned for now: we let ITK download, configure, build and
install vxl.
Merge branch 'master' of https://github.com/dfroger/df-conda-recipe
Merge branch 'master' of https://github.com/dfroger/df-conda-recipe
build conda package against libc 2.11.1
fix yaml-cpp conda build number