fix redirect_url to redirect_uri
Update authentication.md
Update accounts.md
Update positions.md
Update orders.md
Update trades.md
Update transactions.md
Update rates.md
Update trading_quick_start.md
Update orders.md
Update trades.md
Update trades.md
Update orders.md
Merge branch 'master' into fxgame

Conflicts:
	sections/accounts.md
	sections/authentication.md
fix merge issues + typos