bring forcebinary code in line with rpm by checking the SOURCEPACKAGE tag
Merge pull request #28 from e9925248/master

Improve debtransform test
- basic support for collecting build statistics
- add proper error message when kiwi creates broken symlinks
monitor also memory usage in vm builds
- export ovf and qcow2 files directly for vmx kiwi builds
- ignore .rpm-cache when building preinstallimages
- Arch::parse(): don't hang on unbalanced quotes
Support 'Constraint:' directive
implement "empty keep" mode for gcc developers
enhance empty keep mode a bit
do not filter out file prereqs, needs tweaking in expanddeps and OBS code
of well, revert last commit and do everything in Rpm.pm
support Build::Rpm::unfilteredprereqs to turn off prereq filtering
mount proc fs for rpmlint checks
fix the !unfilteredprereqs case
support "ExpandFlags"
support zypp's dir:// repos in the download helper
- avoid new lines in xml elements of _statistics file
- make sure all preinstalls are in the expanded package list [bnc#781327]