Initial add of libtiff.
Do not use vtk's own libtiff since it fails on Darwin.
git: Update to 2.1.0
Merge pull request #421 from jcftang/wip-update-git

git: Update to 2.1.0
Merge pull request #422 from jcftang/wip-hugo

hugo: initial add of static site compiler
ansible: update to 1.7.1
- Use libtiff on all platforms.
- No need to set INCLUDE and LIBRARY variables for libtiff since CMAKE_PREFIX_PATH is set.
Merge pull request #423 from jcftang/wip-update-ansible

ansible: update to 1.7.1
Merge pull request #402 from hashdist/johannr/vtk-libtiff

VTK use libtiff
hugo: update to tip to get a bug fix and also relocatable: false