Add Memory backend

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add proper tooltip for Memory Heatmap

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Fix small bug with vcpu value 'null'

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add timeseries graph horizontal ticks (time)

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add timeseries graph tooltip

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Fix 'null' values in both timeseries graph and storage

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Merge branch 'refs/heads/master' into dev

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>

Conflicts:
	web/apps/dashboard.html
Add Dashboard Heatmap stat computation

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Change Tooltip to handle multiple lines of info

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Small Fix: handle data nulls in tooltip

Signed-off-by: debuger <debuger@softwarefrontier.com>
Fix getInfoForAllHosts to keep an order

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>