Added version to runtime_client dependency (#7)

* 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

Author: sapessi

lambda-runtime/Cargo.toml

@@ -18,7 +18,7 @@ log = "^0.4"
 hyper = "^0.12"
 tokio = "^0.1"
 backtrace = "^0.3"
-lambda_runtime_client = { path = "../lambda-runtime-client"}
+lambda_runtime_client = { path = "../lambda-runtime-client", version = "^0.1" }
 chrono = "^0.4"
 simple_logger = "^1"