Merge pull request #57 from shengwen1997/master

Complete the serial structure and add the SD status checking function
Merge pull request #58 from shengwen1997/master

Sort the C Std functions
Merge pull request #61 from shengwen1997/master

Complete the MIT License information
Update README.md

fix wrong description
Merge pull request #62 from shengwen1997/master

Remove the SD Configuration related code
Fix some grammar errors
Merge branch 'master' of https://github.com/QuadCopterTainan/QuadcopterFlightControl

Conflicts:
	README.md
Merge pull request #63 from fboris/master

Fix some grammar errors
Merge pull request #64 from shengwen1997/master

Create the folder "config" and rename "sys_manger" to "global"
Rename some system files and remove the old test files
Fix the wrong FPU mode
Move the floder "stdlib" into the "lib"
Move the debug files into the new folder "debug"
Add startup's obj file remove action in the Makefile
Move LINENOISE.md into the new folder "documentation"
let user can set baudrate in the QuadCopterConfig.h
Create the LED operating functions
Merge pull request #70 from zxc2694/master

let user can set baudrate in the QuadCopterConfig.h
Add test command for testing the new function
Unblock the blocking code under STM32F4-Discovery board