[client][hosts_ajax] Add a test page for showing hostgroup.
[Server][HatoholHostgroupDialog] Add a new dialog:
HatoholHostgroupDialog

This is a dialog to try showing the hostgroup.
When I finish to try showing the hostgroup,
maybe I will remove this dialog.
[Server][FaceRest] Set condition for target serverID.
[Client][Hosts] Show groups of selected serverID.
[Client][HatoholHostgroupDialog] Fix a showing parameter.
[Client][triggers] Remove comment out.
[Client][triggers] Add skelton way to get the hostgroups.
[Server][FaceRest] Add a new function: addHostgroupData
[Server][FaceRest] Change function definition, name and signature.

* Remove a member function of FaceRest class.

* addHostgroupData ->
  buidHostgroup

Other functions aren't named such.
Because I think other functions name don't match a role of the function.
And, When I'll be free, I'll change those function name.

* agent ->
  outputJson

The reason is same as the above.
I think it is good that we will change function name and parameter name to match
a role of the function and parameter.
[Server][FaceRest] Change calling function name.

I forgot to change...
[Server][FaceRest] Change a function parameter type.

FaceRest::RestJob ->
UserIdType

Because this function doesn't need all RestJob member variables.
This function need a user ID only.
[Server][FaceRest] Output json data includes in servers object.
[Server][DBClientHatohol] Return trigger data with hostgroup id.

But, this commit occurs failure of test.
Because, this commit don't correspond some condtion such as "WHERE".
[Server][DBClientHatohol] Get trigger data together with hostgroup id.

I decided to return together with hostgroup id when retrieve other data
(events, items).
Merge branch 'master' into issue27-client

Conflicts:
	server/src/DBClientHatohol.cc
[Server][HostResourceQueryOption] Add a new parameter in getCondition()
function to correspond to SQL variable (e.g.:this is using in join).
[Server][DBClientHatohol] Change a method when using table variable.
[Server][HostResourceQueryOption] Fix condition.
[Server][test][mkTestDB] Add contents of tables.
[Server][DBClientTest] Fix test data of HostgroupElement.