Add marker.py
Add intensity sliders
Minor: Fix arguments of figimage
Add mouse events to move image
Minor: Improve readability
Add a image slider
Move matplotlib to OpenGL
Add a image slider and intensity sliders
Add zoom function with wheelevent
Scale on mouse position
Minor: Fix scale bug
Add marker label
Minor: Change layout
Get image position
Draw a blended point to test
Fix position of blended point(marker)
Save markers and Change names
Minor: Check None value of a marker
Merge branch 'marker'