Merge pull request #342 from mcmonkey4eva/master

Add infinite duration option to - showfake, make reload command warn on script errors, fix 338
Merge pull request #343 from mcmonkey4eva/master

Add player.xp.to_next_level, fixes #330 - Thanks mcmonkey!
Merge pull request #345 from mcmonkey4eva/master

Add tag npc.script
Add documentation for Util tags, some more dPlayer tags
Fix doc errors