Upgrade patchelf
Make 'hit' tool available from Bash in hashstack scripts
Relocateable packages
Prepend PKG_CONFIG_PATH in when_build_dependency.

This helps avoiding accidents where we accidentally use
a system package despite specifying a local package.
Follow the hashdist rename relocateable -> relocatable
add dummy install stage
follow the main -> command_line_entry_point rename
Merge branch 'master' into relocateable

Conflicts:
	pkgs/openssl.yaml
openssl is not relocatable
switch to the new post_process: mechanism
Fix for relocation
Add a patch to silence some Boost compiler warnings that clog up the build output of some
packages (such as piranha).
Merge pull request #238 from lanewittgen/pkg_config_path_prepend

Prepend PKG_CONFIG_PATH in when_build_dependency.
Update ansible to 1.6.6 due to security updates
Update git to 2.0.1 -- general bug fixes
Merge pull request #343 from jcftang/wip-update-ansible

Update ansible to 1.6.6 due to security updates
Merge pull request #344 from jcftang/wip-update-git

Update git to 2.0.1 -- general bug fixes
Merge pull request #341 from bluescarni/boost_warn_fix

Add a patch to silence some Boost compiler warnings
Merge pull request #219 from hashdist/relocateable

Relocateable packages

Conflicts:
	pkgs/png.yaml

prepend pkg-config paths for now
Use pkgconf as pkg-config implementation, add relocation wrapper