Update Dialyzer section in README.md (#323)

* Update Dialyzer section in README.md

* Another update of Dialyzer section

* Update README.md

* Add refer to dialyxir docs

Author: SerenityIK

README.md

@@ -85,9 +85,13 @@ Starting in Elixir 1.6, Mix compilers adhere to the [Mix.Task.Compiler](https://
 
 ## Dialyzer integration
 
-ElixirLS will automatically analyze your project with Dialyzer after each successful build. It maintains a "manifest" file in `.elixir_ls/dialyzer_manifest` that stores the results of the analysis. The initial analysis for a project can take a few minutes, but after that's completed, modules are re-analyzed only if necessary, so subsequent analyses are typically very fast -- often less than a second. It also looks at your modules' abstract code to determine whether they reference any modules that haven't been analyzed and includes them automatically.
+ElixirLS will automatically analyze your project with [Dialyzer](http://erlang.org/doc/apps/dialyzer/dialyzer_chapter.html) after each successful build. It maintains a "manifest" file in `.elixir_ls/dialyzer_manifest` that stores the results of the analysis. The initial analysis for a project can take a few minutes, but after that's completed, modules are re-analyzed only if necessary, so subsequent analyses are typically very fast -- often less than a second. It also looks at your modules' abstract code to determine whether they reference any modules that haven't been analyzed and includes them automatically.
 
-You can control which warnings are shown using the `elixirLS.dialyzerWarnOpts` setting in your project or IDE's `settings.json`. To disable it completely, set `elixirLS.dialyzerEnabled` to false.
+You can control which warnings are shown using the `elixirLS.dialyzerWarnOpts` setting in your project or IDE's `settings.json`. Find available options in Erlang [docs](http://erlang.org/doc/man/dialyzer.html) at section "Warning options".
+
+To disable Dialyzer completely, set `elixirLS.dialyzerEnabled` to false.
+
+Check usage details in Dialyxir docs on [GitHub](https://github.com/jeremyjh/dialyxir#usage) and [hexdocs](https://hexdocs.pm/dialyxir/readme.html).
 
 ElixirLS's Dialyzer integration uses internal, undocumented Dialyzer APIs, and so it won't be robust against changes to these APIs in future Erlang versions.