Merge pull request #2 from akkadotnet/dev

Dev
Merge branch 'dev' of https://github.com/akkadotnet/akka.net into dev
Made singleton message ctor's public for serialization
Added test to ensure singletons with private ctor can be serialized/deserialized
Removed MD/rST documentation from code repository
Merge pull request #218 from rogeralsing/dev

Removed documentation from code repository