Two-button sprite editing

[airstruck]

Feature suggestion: allow use of left and right mouse buttons when editing sprites. Left click on palette selects one color, right click selects another. Left click on sprite editor draws with "left color," right click draws with "right color." This way you can right-click on black and use right mouse button to "erase," for example.

[Rami-Sabbagh]

This is a good suggection, I'll added it in v0.0.2

[Rami-Sabbagh]

It will be in V0.0.2 for now