add Typo object
rename
rename
remove test code
typo prototype
implement messaging
implement messaging (uncomplete)
refine Typo.js
remove unused file
refine background.js
restore html2canvas.js
iterator screenshot (uncomplete)
improve can't use captureVisibleTab (uncomplete)
add instant invoke function
still error at for loop access value
remove html2canvas.js, complete captureVisibleTab
remove html2canvas.js, complete captureVisibleTab
datauri to image
refine
add imagesloaded.js, complete concatenate images