Added corresponding balances widget (nonfuntional)
Moved order book summary to a separate template
Fixed trading.html div and indentation
Moved trade widgets into one css class
Added trading-balance-controller.js to index.html
Created new accountLines service
Fetch account balance in the trading balance widget
Created roundAmount, a filter that explicitly takes in a currency code and filters a balance
Reverted dashboard controller to not use AccountLines/Balances service
Added TODO comment to dashboard controller
Moved accountLines service to a full Balances service; Finished up trading balance
Merge branch 'trading' into trading-balance-widget

Conflicts:
	app/index.html
	app/states/trading.html
Merge pull request #851 from stellar/trading-balance-widget

Trading balance widget