Better formatting and tag stripping for note title display

cleaned up interface a bunch
allow for opening of two notes at once
Escape closes note
Added global helper class and time ago function
Time ago function displays on main page and in note
Removed tab button creating tabbed spaces in document
Simplified save text

client/src/Helpers.js

@@ -0,0 +1,62 @@
+import Vue from 'vue'
+
+const helpers = {}
+
+helpers.timeAgo = (time) => {
+	const time_formats = [
+		[ 60, 			'seconds', 			1						],
+		[ 120, 			'1 minute ago', 	'1 minute from now'		],
+		[ 3600, 		'minutes', 			60						],
+		[ 7200, 		'1 hour ago', 		'1 hour from now'		], 
+		[ 86400, 		'hours', 			3600					], 
+		[ 172800, 		'yesterday', 		'tomorrow'				],
+		[ 604800, 		'days', 			86400					],
+		[ 1209600, 		'last week', 		'next week'				],
+		[ 2419200, 		'weeks', 			604800					],
+		[ 4838400, 		'last month', 		'next month'			],
+		[ 29030400, 	'months', 			2419200					],
+		[ 58060800, 	'last year', 		'next year'				],
+		[ 2903040000, 	'years', 			29030400				],
+		[ 5806080000, 	'last century', 	'next century'			],
+		[ 58060800000, 	'centuries', 		2903040000				]
+	]
+
+	//How many seconds ago was input event time?
+	let seconds = Math.round((+new Date)/1000) - time
+	let token = 'ago'
+	let list_choice = 1
+	
+	if (seconds == 0) {
+		return 'Just now'
+	}
+
+	if (seconds < 0) {
+		seconds = Math.abs(seconds)
+		token = 'from now'
+		list_choice = 2
+	}
+	
+
+	let i = 0
+	let format = null
+	while (format = time_formats[i++]){
+		if (seconds < format[0]) {
+			if (typeof format[2] == 'string') {
+				return format[list_choice]
+			} else {
+				return Math.floor(seconds / format[2]) + ' ' + format[1] + ' ' + token
+			}
+		}
+	}
+
+	return time
+}
+
+const plugin = {
+    install () {
+        Vue.helpers = helpers
+        Vue.prototype.$helpers = helpers
+    }
+}
+
+Vue.use(plugin)