Fix Handling of Enchanted Books as Inputs to Create Factories

After adding more tracing I discovered that FactoryModPlugin.createItemStack()
was not using the storedEnchants argument due to a faulty if-condition.
Trivial fix.
Fix Recipes that use Spawn Eggs and Warn of Invalid Materials

The Mad Scientist Laboratory recipes referenced invalid material name SPAWN_EGG.
This was corrected and code added to issue an error message when the name of
a material is invalid.
Corrections to the Enchanted Books Correction

 * Bumped plugin version.
 * potionEffects as another argument that was being ignored and now is not; compiles, untested.
Merge pull request #58 from totemo/master

Fix Handling of Enchanted Books as Inputs to Create Factories