OrderedDict creates circular references

[farshadkh]

Kairos is using OrderedDict heavily and by its implementation, OrderedDict creates circular references. This causes memory leaks for apps which have gc disabled due to the performance increase.

I suggest:
1- Announce this in the documentation so people with gc disabled would know what's eating up their memory.
2- If possible replace OrderedDict implementation with something without circular references. There is odict package in pypi.