Enable third party contributions

- Add instructions for contributing to ARM Trusted Firmware.

- Update copyright text in all files to acknowledge contributors.

Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5
diff --git a/docs/change-log.md b/docs/change-log.md
index 963f578..841def9 100644
--- a/docs/change-log.md
+++ b/docs/change-log.md
@@ -41,6 +41,11 @@
     them have been merged together, and some alignment constraints on sections
     have changed.
 
+*   Enable third party contributions. Add a new contributing.md containing
+    instructions for how to contribute and update copyright text in all files to
+    acknowledge contributors.
+
+
 ARM Trusted Firmware - version 0.2
 ==================================
 
@@ -112,8 +117,8 @@
 Detailed changes since last release
 -----------------------------------
 
-First source release – not applicable.
+First source release - not applicable.
 
 - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-_Copyright (c) 2013 ARM Ltd. All rights reserved._
+_Copyright (c) 2013, ARM Limited and Contributors. All rights reserved._
diff --git a/docs/porting-guide.md b/docs/porting-guide.md
index a3ef99e..0b07111 100644
--- a/docs/porting-guide.md
+++ b/docs/porting-guide.md
@@ -928,7 +928,7 @@
 
 - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-_Copyright (c) 2013 ARM Ltd. All rights reserved._
+_Copyright (c) 2013, ARM Limited and Contributors. All rights reserved._
 
 
 [User Guide]: user-guide.md
diff --git a/docs/user-guide.md b/docs/user-guide.md
index 8a59582..476fc00 100644
--- a/docs/user-guide.md
+++ b/docs/user-guide.md
@@ -1204,7 +1204,7 @@
 
 - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-_Copyright (c) 2013 ARM Ltd. All rights reserved._
+_Copyright (c) 2013, ARM Limited and Contributors. All rights reserved._
 
 
 [Change Log]: change-log.md