README.md

- make distribution tarballs report logrotate version properly
  [RHBZ#1500264](https://bugzilla.redhat.com/1500264)
- make ```(un)compress work``` even if stdin and/or stdout are closed (#154)
- remove ```-s``` from ```DEFAULT_MAIL_COMMAND``` and improve its documenation (#152)
- uncompress logs before mailing them even if ```delaycompress``` is enabled (#151)
- handle unlink of a non-existing log file as a warning only (#144)
- include compile-time options in the output of ```logrotate --version``` (#145)
- make ```logrotate --version``` print to stdout instead of stderr (#145)
- flush write buffers before syncing state file (#148)
- specify (un)compress utility explicitly in tests (#137)
- enable running tests in parallel (#132)
- explicitly map root UID/GID to 0 on Cygwin (#133)
- add ```.dpkg-bak``` and ```.dpkg-del``` to default tabooext list (#134)