Stop requiring people to sign CLA

Same as OpenLayers: openlayers/openlayers#7711

Author: gberaudo

CONTRIBUTING.md

@@ -11,12 +11,8 @@ This page describes what you need to know to contribute code to ol-cesium as a d
 
 ## Contributor License Agreement
 
-Before accepting a contribution, we ask that you provide us a Contributor
-License Agreement.  If you are making your contribution as part of work for
-your employer, please follow the guidelines on submitting a [Corporate
-Contributor License Agreement](https://raw.github.com/openlayers/cla/master/ccla.txt). If you are
-making your contribution as an individual, you can submit a digital [Individual
-Contributor License Agreement](https://docs.google.com/spreadsheet/viewform?formkey=dGNNVUJEMXF2dERTU0FXM3JjNVBQblE6MQ).
+Your contribution will be under our [license](https://raw.githubusercontent.com/openlayers/ol-cesium/master/LICENSE)
+as per [GitHub's terms of service](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license).
 
 ## Setting up development environment
 
@@ -40,12 +36,6 @@ where `<target>` is the name of the target you want to execute. For example:
 
     $ make dist
 
-## Compliler version
-
-The version of the compiler may be changed by creating a file closure-util.json
-at the root of the project. See [available options](https://github.com/openlayers/closure-util/blob/master/default-config.json)
-and [available compilers](https://github.com/google/closure-compiler/wiki/Binary-Downloads).
-
 ## Pull request guidelines
 
 Your pull request should follow the OpenLayers guidelines.
@@ -76,8 +66,6 @@ For readablitiy, testing for `undefined` and `null` must be handled as follows:
 - In the case of objects: use `the object itself`;
 - In all cases where the type is unknown, like with templates: use `object !== undefined && object !== null`.
 
-
-
 ### Address a single issue or add a single item of functionality
 
 Please submit separate pull requests for separate issues.  This allows each to

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014, OpenLayers
+Copyright 2014-present, OpenLayers Contributors
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without