Added instructions to get the sources with submodules

FunKey/board/funkey/readme.txt

@@ -6,13 +6,25 @@ Intro
 This directory contains a buildroot-based external configuration for
 building the FunKey.
 
+How to get it
+===============
+
+Clone the FunKey OS repository and the required submodules from
+BitBucket:
+
+  $ git clone --recurse-submodules git@bitbucket.org:keymu2/funkey-os.git <Funkey directory>
+
+Then enter into the created directory:
+
+  $ cd <Funkey directory>
+
 How to build it
 ===============
 
 Configure Buildroot
 -------------------
 
-There is only one FunKey defconfig files in Buildroot:
+There is only one Funkey defconfig files in Buildroot:
 
   $ ./fun funkey_defconfig
 
@@ -38,7 +50,6 @@ After building, you should obtain this tree:
     +-- boot.vfat
     +-- rootfs.ext2
     +-- rootfs.ext4 -> rootfs.ext2
-    +-- rootfs.tar
     +-- sdcard.img
     +-- sun8i-v3s-funkey.dtb
     +-- u-boot.bin
@@ -53,7 +64,7 @@ Once the build process is finished you will have an image called
 
 Copy the bootable "sdcard.img" onto an SD card with "dd":
 
-  $ sudo dd if=<FunKey directory>/FunKey/output/images/sdcard.img of=/dev/sdX
+  $ sudo dd if=<Funkey directory>/FunKey/output/images/sdcard.img of=/dev/sdX
 
 Alternatively, you can use the Etcher graphical tool to burn the image
 to the SD card safely and on any platform:

README.md

@@ -6,6 +6,18 @@ Intro
 This directory contains a buildroot-based external configuration for
 building the FunKey.
 
+How to get it
+===============
+
+Clone the FunKey OS repository and the required submodules from
+BitBucket:
+
+  $ git clone --recurse-submodules git@bitbucket.org:keymu2/funkey-os.git <Funkey directory>
+
+Then enter into the created directory:
+
+  $ cd <Funkey directory>
+
 How to build it
 ===============