Removed SDK keyword (awslabs#9)

* Updated header values for provided runtime and switched to ms time remaining

* Fixed issue with deadline not being set in context and switched to realtime clock to get correct epoch

* Removed libc dependency and switched to chrono for deadline calculation

* Fixed docs example not to import HttpRuntimeClient

* New error reporting method with correct content type and error type header.

* Two fixes to honor max retries in the get_next_event method and call the error_reponse rather than init_fail when an error is thrown after the call to /next

* Added homepage, docs, and repo to Cargo files

* Added version of runtime client dependency

* Passed environment config as reference and added fail on warnings

* Removed SDK keyword

Author: sapessi

lambda-runtime-client/Cargo.toml

@@ -3,7 +3,7 @@ name = "lambda_runtime_client"
 version = "0.1.0"
 authors = ["Stefano Buliani", "David Barsky"]
 description = "Client SDK for AWS Lambda's runtime APIs"
-keywords = ["AWS", "Lambda", "Runtime", "API", "Client", "SDK"]
+keywords = ["AWS", "Lambda", "Runtime", "API", "Client"]
 license = "Apache-2.0"
 homepage = "https://github.com/awslabs/aws-lambda-rust-runtime"
 repository = "https://github.com/awslabs/aws-lambda-rust-runtime"