readme update
Merge remote-tracking branch 'upstream/master'
Updated old DnD Next sheet to tidy up documentation in an effort to make it clearer that this sheet is for the playtest ruleset only!
Fixed #427 - Missing ] in npc intimidation roll.  Thanks for the report!
Last updated date updated
Fixes #428 - NPC animal handling now uses the NPC mod for the roll and not the player one
Updated labelling of AC value following forum discussions
Merge pull request #424 from Actoba/master

DnD Next Playtest docs update