Delete craft_guide_group.png

not needed, forgot to remove this file again in my updated version
Removes copy&paste code and some bugs were fixed

removes much copy&paste code, saving items in tables instead of inventory slots for "you need:" feature, and it includes a fix to save the text entered in search field
Show recipes for technic machines in craft guide & show crafts of type fuel

Shows recipes from grinder, alloy furnace, extractor, compressor and centrifuge in craft guide, if technic mod is loaded.
Not tested with newest version of technic mod at the moment!
Second, craft guide now shows crafts of type fuel (default is, to show fuel recipes only when there are other craft types for this item).
Although added some function to not display crafts with slabs, panels, microblocks, etc... added by moreblocks mod.
Fixed: search text should now stay there when craft guide is closed.
Forgot to remove some debug log outputs
Changed the adding of additional crafts

Additional crafts are now added to craft list when the formspec changes the first time. This seems better.
Now works with recent versions of technic mod, too

Shows recipes of machines from technic mod, too. This includes recipes for grinder, compressor, extractor, alloy furnace and centrifuge.
Should work with old and new versions of technic mod.
Also added code to better handle aliases which occur in recipes.
Override minetest register.alias
Fixed restoring of text entered in search field
Merge pull request #4 from Miner59/master

New pull request because I found a small bug in old one