Updated 'basic recipes.html' at recipe syntaxes;

Updated 'advanced recipes.html' adding example explosive fuel.
Some debug code that is commented out to not affect the user.
Removed old documentation for @forchance and removed the empty example.
Fixed @explode not triggering for fuels;

Fixed @explode glitching furnace when exploding because it explodes before the furnace changes state, added 1 tick delay.
Replaced  'recipemanager.skipflags.<flag>' with 'recipemanager.flag.<flag>' and defaulted to true;

Removed a pointless permission check in Flags class.
Code cleanup, format and a small fix.
Changelog for version 2.0 release.