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/drivers/arm/interconnect/cci-400/cci400.c b/drivers/arm/interconnect/cci-400/cci400.c
index 60586ab..55b4032 100644
--- a/drivers/arm/interconnect/cci-400/cci400.c
+++ b/drivers/arm/interconnect/cci-400/cci400.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/arm/interconnect/cci-400/cci400.h b/drivers/arm/interconnect/cci-400/cci400.h
index 62e2fbb..72e6f4e 100644
--- a/drivers/arm/interconnect/cci-400/cci400.h
+++ b/drivers/arm/interconnect/cci-400/cci400.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/arm/peripherals/pl011/console.h b/drivers/arm/peripherals/pl011/console.h
index b98db61..7747d4d 100644
--- a/drivers/arm/peripherals/pl011/console.h
+++ b/drivers/arm/peripherals/pl011/console.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/arm/peripherals/pl011/pl011.c b/drivers/arm/peripherals/pl011/pl011.c
index 2f6f5ea..cc18fc0 100644
--- a/drivers/arm/peripherals/pl011/pl011.c
+++ b/drivers/arm/peripherals/pl011/pl011.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/arm/peripherals/pl011/pl011.h b/drivers/arm/peripherals/pl011/pl011.h
index 53b4dab..0a30291 100644
--- a/drivers/arm/peripherals/pl011/pl011.h
+++ b/drivers/arm/peripherals/pl011/pl011.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/power/fvp_pwrc.c b/drivers/power/fvp_pwrc.c
index c7db33b..2b98b05 100644
--- a/drivers/power/fvp_pwrc.c
+++ b/drivers/power/fvp_pwrc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
diff --git a/drivers/power/fvp_pwrc.h b/drivers/power/fvp_pwrc.h
index a2efcc5..050c33b 100644
--- a/drivers/power/fvp_pwrc.h
+++ b/drivers/power/fvp_pwrc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, ARM Limited. All rights reserved.
+ * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met: