Including CHANGELOG into MANIFEST.in

CHANGELOG is now included when running make dist.
Merge pull request #75 from craneworks/changelog

Including CHANGELOG into MANIFEST.in
readme update
ifaddrmsg: flags encoding/decoding routines

Bug-Url: https://github.com/svinota/pyroute2/issues/71
tests: re-enable examples tests for Python2
tests: re-enable for RHEL6.5

Bug-Url: https://github.com/svinota/pyroute2/issues/42
Merge pull request #77 from craneworks/gitignore

git ignores now MANIFEST and the dist directory
Merge remote-tracking branch 'upstream/master'