Period object in dataframe index or columns cannot be retrieved correctly after saving to version store

[whumei]

Period object will be read as integer from Arctic version

Do you have any future release plan on support Period objects?

[bmoscon]

This is something we should fix. We should either support them or issue an exception when the user tries to use a datatype that has a period in it.

[whumei]

I think arctic should support it, since it is pandas objects. throwing exception does not sound right.