get back some of the self-backtrace functionality
fix race in open of chunked files
log file sizes of regular files (and chunked files)
add some texual documentation of the cloud testing infrastructure
add a ASCII-art flow chart
Merge pull request #170 from reneme/doc_cloud_testing

Cloud Testing: General Documentation
FIX: remove libraries from add_executable resp. add_library
(they belong into the target_link_library directive)
Merge pull request #171 from reneme/fix_build_system

FIX: Configure failed because of misplaced library pathes
FIX: remove double listing of testutil.{cc|h} in test/unittests/CMakeLists.txt
Merge pull request #172 from reneme/fix_unittest_build

FIX: remove double listing of testutil.{cc|h}
FIX: stacktrace creation
Merge pull request #173 from reneme/fix_stacktrace

FIX: Stacktrace Creation
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