Merge pull request #135 from coder-xiaomo/patch-1

Update Contributor License Agreement link

Author: amaembo

CONTRIBUTING.md

@@ -1,5 +1,5 @@
 ### How to contribute
-If you are not a JetBrains' employee you must sign [Contributor License Agreement](https://www.jetbrains.org/display/IJOS/Contributor+Agreement) first. 
+If you are not a JetBrains' employee you must sign [Contributor License Agreement](https://www.jetbrains.com/legal/docs/agreements/cla/) first. 
 You may do it [electronically](https://www.jetbrains.com/agreements/cla/). After that send your changes as a pull request or commit them directly to a branch.
 
 ### Versioning
@@ -31,4 +31,4 @@ the corresponding element is marked as deprecated and then remove it in one of t
 ### Retention policy
 No annotation in this package should have `RUNTIME` retention policy. Only `SOURCE` and `CLASS` policy is accepted. 
 The `CLASS` policy is preferred. The `SOURCE` policy could be used in rare cases when compilation could not preserve all 
-the necessary information (e.g. `@MagicConstant` annotation).
+the necessary information (e.g. `@MagicConstant` annotation).