Rename temperature to legend

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Adjust heatmap to stage2 design

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Replace heatmap by barchart in vcpu

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add Storage and Network graph backend

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