Update Installer.wxs

test dev builds

test dev builds

Update appveyor.yml

Update appveyor.yml

adding more settings (grid alpha, default resolution), #build

test #build

Update README.md

add quick fill (with left button doubleclick), fix null ref when clic…

…king empty last palette spot, cleanup Start(), remove unused var c,

add save as and save (existing file), show current save filepath in w…

…indow title