add .hgignore to make use of Mercurial easier
add Mercurial to isDevVersion()

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extra : source : e048ef52ec5c435130f2be08cb965567e811f8e4
make stdout unbuffered to ensure proper updates of sceneView

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extra : source : 94d8184628cf890b18ea4ff9382fc39699490a0f
always show numbers on slider

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extra : source : 634ece8776ec3ffa73227fbd733734dc34baf10f
show printing z position in gcode view via layer range and slider

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extra : source : 4c79c88d8b17cf02771861eeed9c2e09b113c24d
make VirtualPrinter much faster

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extra : source : fb98aa778d7f0cb761ad7fa860cdd4505a96759e
Merge pull request #681 from hg42/faster-virtualprinter

Faster virtualprinter