Release postgres 0.15.2

Author: sfackler

postgres/Cargo.toml

@@ -1,11 +1,10 @@
 [package]
 name = "postgres"
-version = "0.15.1"
+version = "0.15.2"
 authors = ["Steven Fackler <sfackler@gmail.com>"]
 license = "MIT"
 description = "A native PostgreSQL driver"
 repository = "https://github.com/sfackler/rust-postgres"
-documentation = "https://docs.rs/postgres/0.15.1/postgres"
 readme = "../README.md"
 keywords = ["database", "postgres", "postgresql", "sql"]
 include = ["src/*", "Cargo.toml", "LICENSE", "README.md", "THIRD_PARTY"]