Improved stairplus recipes

[neinwhal]

Same as #101 Except I moved all the changes to craig_server instead Likewise with the morechest changes, it is difficult to make these changes separately. However, to make future updates easier, I moved these changes into a separate function in craig_server to be called upon. So for future updates, all that is required to be done is, comment out existing stairplus recipe + add cgserver.register_simple_recipes(category, alternate, modname, subname, recipeitem) inside of mods/moreblocks/stairsplus/recipes.lua