'tuned' troubleshot information in README file

Added information and tips about some problems that might
occur with 'tuned' and how to solve them.

Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
UI: Host sensors data visualization

This patch support the UI of Host sensors

Signed-off-by: Wen Wang<wenwang@linux.vnet.ibm.com>