Place link to Markdown help prominently in Tavern chat (fix #1906)
Consistent formatting of markdown hint in group edit fields
Tweak shop wording to remove "yet": eggs/potions/food might be used up or sold off.
Correct and clarify some details on contributor rewards
Change Markdown help link to point at HabitRPG wiki
Fix a few typos/inaccuracies in English app.json
Merge remote-tracking branch 'origin/sabe_tweak' into develop

Conflicts:
	views/options/social/tavern.jade