Uses boost.python list instead of std::vector<int>

data_container_t.timestamp became easy to use
You can now write:
```
dc = data_container_t('data')
dc.timestamp.tv_sec = 123
dc.timestamp.tv_nsec = 456789
```
or
```
dc.timestamp = timestamp(123, 456789)
```

lookup_result_t cannot be constructed from python script
Fixed bug: field `m_embeded` was not copied in move constructor