mineclonia git switched to mcl_redstone instead of mesecons, breaking crafting recipe for chainsaw

[programmerjake]

since there isn't a mesecons_buttons mod in mineclonia git anymore and there are aliases, the code should check for an item existing rather than the named mod existing.

technic/technic/tools/chainsaw.lua

Lines 199 to 200 in 32f1d5a

	local trigger = has_mcl and mesecons_button and "mesecons_button:button_wood_off"
	or mesecons_button and "mesecons_button:button_off" or "default:mese_crystal_fragment"

[S-S-X]

Feel free to open pull request for this change if you like, also for #386