add st7565 support
add selection of st7565
fix glyph display
Merge pull request #232 from wuflnor/edge

add st7565 support
Make filename a private variable.
Added M26 to abort print and then reload file.
Put gcodes in Player.cpp in the right order.
Merge branch 'feature/M26' into edge
Made M17 and M18 apply to extruder as well as steppers.
M18 and M84 now accept E to disable only the extruder, not the steppers.
Made M17 and M18 apply to extruder as well as steppers.
M18 and M84 now accept E to disable only the extruder, not the steppers.
Merge pull request #235 from TopherMan/feature/extruder_disable

Feature/extruder disable
Merge remote-tracking branch 'upstream/edge' into edge