Edit the readme file.

Signed-off-by: Tony Zhang <[email protected]>

README.md

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+# wiringBP README
+
+This is a modified WiringPi for Banana Pro/Pi. We call it WiringBP.
+It is based on the original [WiringPi for Raspberry Pi created by Drogon](http://wiringpi.com/).
+The modification is done by [LeMaker](http://lemaker.org). The WiringBP API usage are the same to the original wiringPi.
+You can donwload the WiringBP from:
+https://github.com/LeMaker/WiringBP.git.
+
+## Download
+### For Banana Pro
+    git clone https://github.com/LeMaker/WiringBP.git -b bananapro
+### For Banana Pro
+    git clone https://github.com/LeMaker/WiringBP.git -b bananapi
+## Installation
+    cd WiringBP
+    chmod +x ./build
+    sudo ./build
+
+## Examples
+You can go to LeMaker wiki to see the basic examples: http://wiki.lemaker.org/WiringPi
+
+You can also use the examples and instructions provided by http://wiringpi.com/
+
+And the source directory examples also has many demo.
+
+Thanks!
+
+LeMaker Team
+