David Hsueh

Results 3 issues of David Hsueh

-Append the string to font-awesome 4.3.0 -Add a easy class to generate the string.xml from font-awesome.css

``` [case1]: 1s1| 1 s 1 | < input a blank will cause auto format | < ctrl+z to undo 1 s 1 | < ctrl+y to redo 1 s...

update qrcode.clear() method and it can be used when useSVG=false add the useSVG in options and update the README.md