Update README.md (#938)

Add licensing information for remaining files and directories.

See: #933

Author: pelwell

README.md

@@ -2,15 +2,21 @@ This repository contains pre-compiled binaries of the current Raspberry Pi
 kernel and modules, userspace libraries, and bootloader/GPU firmware.
 
 A rough guide to this repository and the licences covering its contents is 
-below (check the appropriate directories for full licence details):
+below (check the appropriate directories for more specific licence details):
 
-* ./boot: *start.elf, bootcode.bin and loader.bin are the GPU firmware and 
-  bootloaders. Their licence is described in 'LICENCE.broadcom'. The 
-  kernel.img files are builds of the Linux kernel, released under the GPL (see 
-  COPYING.linux)
-* ./debug: pre-built modules for the kernel_debug.img
-* ./extra: System.map files for the provided kernel builds
-* ./hardfp: userspace VideoCoreIV libraries built for the armv6 hardfp ABI
-* ./modules: pre-built modules for kernel.img
-* ./opt/vc: includes userspace libraries for the VideCoreIV (EGL/GLES/OpenVG 
-   etc). See ./opt/vc/LICENCE for licencing terms
+* boot:
+    * *start.elf, bootcode.bin and loader.bin are the GPU firmware and 
+    bootloaders. Their licence is described in `boot/LICENCE.broadcom`.
+    * The kernel.img files are builds of the Linux kernel, released under the GPL
+    (see `boot/COPYING.linux`)
+    * The dtbs, overlays and associated README are built from Linux kernel
+    sources, released under the GPL (see `boot/COPYING.linux`)
+* debug: pre-built modules for the kernel_debug.img (`boot/COPYING.linux`)
+* documentation/ilcomponents: OpenMax IL documentation (`boot/LICENCE.broadcom`)
+* extra: System.map files for the provided kernel builds (`boot/COPYING.linux`),
+  and dt-blob.dts (`boot/LICENCE.broadcom`)
+* hardfp/opt/vc: userspace VideoCoreIV libraries built for the armv6 hardfp ABI
+  (`opt/vc/LICENCE`)
+* modules: pre-built modules for kernel.img (`boot/COPYING.linux`)
+* opt/vc: includes userspace libraries for the VideCoreIV - EGL/GLES/OpenVG 
+  etc. (`opt/vc/LICENCE`)