Default example should use host-lapack

Be more verbose in this example. If a use has lapack installed chances
are blas will be installed as well, but not vice versa.
Initial add of gnu debugger - gdb
gdb: Fail build on OSX and let user know why.
Remove hdf5 patch for cygwin (no longer needed in latest version 1.8.13).
Initial add of libtiff.
Do not use vtk's own libtiff since it fails on Darwin.
Do not add F77, F90 and FC to PETSc configure line on Darwin, since no Fortran compiler is available.
gcc: Remove the lib64 sed hack
gcc: link lib64/* to lib/
hugo: initial add of static site compiler
Merge pull request #422 from jcftang/wip-hugo

hugo: initial add of static site compiler
- 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
Reformat dolfin dependencies.
Merge pull request #402 from hashdist/johannr/vtk-libtiff

VTK use libtiff
Adjust dependencies for fenics packages.
golang: when build dependency expose the bin directory
hugo: update to tip to get a bug fix and also relocatable: false
Merge pull request #424 from jcftang/wip-golang

golang: when build dependency expose the bin directory
Merge pull request #425 from jcftang/wip-hugo

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