[Client][TestUtils] Add test assertions to new function.
[Client][Utils] Add case for nagios.
[Serializer] Add a new class.
[HatoholArmPluginInterface] Convert data to L.E.

With New plugin achitecture, plugin process can run on a remote
commputer. So they might use different byte order. Hapi uses
little endian in the packet.

Actually, it's not needed to convert data on i386 and x86.
Probably LtoN() and NtoL() will be zero overhead.
[server] User a more suitable name.

Serializer ->
EndianConverter
[HatoholArmPluginInterface] Add structures to send ItemDataTable.
[HatoholArmPluginBase] Add a stub method: sendUpdatedTriggers().
[mlpl][SmartBuffer] Add an API description.
[HatoholArmPluginInterface] Add a new method: appendItemData().
[testHatoholArmPluginInterface] Add a test: test_appendItemBool().
[HatoholArmPluginInterface] Fix a build error on Ubuntu 12.04 with clang.

The following message was shown.

HatoholArmPluginInterface.cc:295:31: error: invalid use of non-static data
      member 'length'
              sizeof(HapiItemStringHeader::length),
[testHatoholArmPluginInterface] Add a new test: test_appendItemInt().
[testHatoholArmPluginInterface] Add a new test: test_appendItemUint64().
[HatoholArmPluginInterface] Fix a problem that casts ItemUint64 to int.

This conversion will fail.
[testHatoholArmPluginInterface] Make a helper function.
[testHatoholArmPluginInterface] Clean up.
[testHatoholArmPluginInterface] Clean up.
[testHatoholArmPluginInterface] Fix a bug that takes test data as int.
[DataSamples] Clean up.
[testDBTermCodec] Clean up.