May 2019 changes:
NEW FUNCTION: ALERTS
FINISHED: PORTFOLIOS
https://coinval.co--
2019-05-10
* portfolio: remember on this device
* alerts: remember on this device
* fix non-visible menu on mobile phones
2019-05-09
* cookies expire after 365 days
* alerts: fix last price decimals
* alerts/portfolio: encapsulate tables into 'card'
2019-05-06
* alerts: fixed scaling on mobile devices
* alerts: minified js
* alerts: set strike to current price using a button
* alerts: dismissible red/green alerts
* alerts: fix automatic refresh after changing strike price of active/inactive trigger
* alerts: alert sound
* alerts: fix alert dismiss
* alerts: desktop notifications
* alerts: mobile friendy version fix
* alerts: create a unique URL for new alerts
2019-05-05
* alerts: first version revealed
* alerts: add, remove alerts
* alerts: specify less than/greater with slider
* alerts: specify BTC, USD, EUR etc.
* alerts: real-time update
* alerts: change number of active alerts in page title
* alerts: notify about triggered alert via page title
* alerts: automatically deactivate trigerred alerts
* alerts: activate/deactivate triggers
* fixed excessive refresh rate error
* refresh rate set to 5 seconds
2019-05-04
* portfolio: Value <currency> column fix
* menu: underline fix
