add the redstone stopwatch
# Please enter the commit message for your changes. Lines starting
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# On branch master
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# Changes to be committed:
#	modified:   init.lua
#	new file:   stopwatch.lua
#	new file:   textures/redstone_stopwatch.png
#	modified:   textures/redstonepp_colored_lamp.png
#	modified:   textures/redstonepp_radio_base.png
#	modified:   textures/redstonepp_radio_base_on.png
#
