fix a AMD loading bug
change color button: remove purple && add light gray
publish v2.0.2
FIX: link base64 image should be uploaded
bug fix
remove useless code
Merge pull request #126 from mycolorway/tf/base64_src_image

FIX: link base64 image should be uploaded
added core & selection & util spec
add formatter spec
modify core&util&formatter spec
add UndoManager spec
add Toolbar & Keystroke spec
add button
modify spec