common: scripts for building rpm and dpkg packages

- Add scripts for building rpm and dpkg packages
- Update Makefiles to fulfill Debian policy
- Update README file
- Add initial ChangeLog file
- Create .version file containing version tag outside git repo
test: improve detection of installed Valgrind package version

Also restore vmem_valgrind/TEST4.
Merge pull request #11 from krzycz/valgrind-detection

test: improve detection of installed Valgrind package version
Merge pull request #9 from plebioda/rpm-and-dpkg-building-scripts

common: scripts for building rpm and dpkg packages
blk: add benchmark for PMEMBLK