allow to tag previous versions with additional tags
refurbish bootstrap.sh
Merge pull request #174 from reneme/refurbish_bootstrap

FIX: Refurbished bootstrap.sh
FIX: allow for proper in-source build
rename out of source locations of exterals to build_*
Merge pull request #175 from reneme/refurbish_bootstrap

FIX: Allow for in-source build
FIX: repackage googletest as .tar.gz for portability
make bootstrap.sh error handling more pedantic
Merge pull request #176 from reneme/refurbish_bootstrap

FIX: repackage googletest + make bootstrap.sh scream on failure
added support for openrc init system
FIX: Mac OS X compatibility *sigh*
Merge pull request #178 from reneme/refurbish_bootstrap

FIX: Mac OS X compatibility *sigh*
Merge pull request #177 from sfabbro/master

adapt cvmfs_config and cvmfs_server for openrc