[Client][HatoholMonitoringView] add prototype displayUpdateTime
[Client][Base] add div for display last update time
[Client][WebUI] display last update time per page
[Client][Base] remobe trailing spaces
[JSONParser] Add a method to parse number (double) element.
Merge pull request #666 from project-hatohol/json-parser-double

[JSONParser] Add a method to parse number (double) element.
[HatoholArmPluginBase] Rename a method to improve readablity.

onReceivedFetchItem ->
onReceivedReqFetchItem
[HapProcessStandard] Clean up.
[HapProcessStandard] Add a parameter to skip to setup timer.
[HapProcessStandard] Extend startAcquisition so the caller can change the main process.
[HapProcessStandard] Rename a member function because it's is used only for callback.
[HapProcessStandard] Fetch items on a GLib event loop.
[HapProcessStandard] Follow the rename of the base class's virtual method.
[[HapProcessCeilometer] Implement basic code to get items from ceilometer.
[HapProcessCeilometer] Collect useful items only.
[HapProcessCeilometer] Remove a debug print.
[HapProcessCeilometer] Set 'N/A' to a previous value.
Merge pull request #668 from project-hatohol/item-ceilometer-2

Item ceilometer 2
[HapProcessCeilometer] Include a unit in the name.

For example:
cpu_util ->
cpu_util (%)

disk.read.bytes.rate ->
disk.read.bytes.rate (B/s)
Merge pull request #670 from project-hatohol/ceilometer-item-unit

[HapProcessCeilometer] Include a unit in the name.