added v1.3.7 release notes

[Aaronontheweb]

1.3.7 April 17 2018

Maintenance Release for Akka.NET 1.3

Akka.NET v1.3.7 is a minor patch consisting mostly of bug fixes.

DotNetty stabilization
We've had a number of issues related to DotNetty issues over recent weeks, and we've resolved those in this patch by doing the following:

• Locking down the version of DotNetty to v0.4.6 until further notice
• Resolving memory leaks introduced with DotNetty in v1.3.6

We will be upgrading to DotNetty v0.4.8 in a near future release, but in the meantime this patch fixes critical issues introduced in v1.3.6.

Bugfixes

1. Akka.Persistence.Sql: Slow reading of big snapshots - this will require a recompilation of all Akka.Persistence.Sql-type Akka.Persistence plugins.
2. Akka.Fsharp: spawning an actor results in Exception in 1.3.6 release

See the full list of fixes for Akka.NET v1.3.7 here.

COMMITS	LOC+	LOC-	AUTHOR
5	130	180	Aaron Stannard
3	7	1	chrisjhoare
2	3	1	ivog
1	70	17	TietoOliverKurowski
1	41	4	Bart de Boer
1	11	3	Oleksandr Bogomaz
1	1	1	Vasily Kirichenko