Prepare release 5.2.1

Prepare release 5.2.0

Prepare release 5.1.0

Merge pull request aaubry#330 from samneirinck/source-location

Add repository location

Prepare release 5.0.0

Prepare release 4.3.2

Merge branch 'jhickson-multipledefinition'

Merge branch 'type-serialization'

Merge remote-tracking branch 'origin/net20'

Prepare release 4.2.3