Add Date type and database release docs

README.md

@@ -52,6 +52,8 @@ assertEquals(A.E.One, A.One)
 - [What's New in 1.5](docs/whats_new_1_5.md)
 - [Testing and Assertions](docs/Testing.md)
 - [Filesystem and Processes (lyngio)](docs/lyngio.md)
+- [SQL Databases (lyng.io.db)](docs/lyng.io.db.md)
+- [Time and Calendar Types](docs/time.md)
 - [Return Statement](docs/return_statement.md)
 - [Efficient Iterables in Kotlin Interop](docs/EfficientIterables.md)
 - [Samples directory](docs/samples)