Fix cyclic references.

[shekharhimanshu]

Looks like ClientCoreState has cyclic references inside action_map_ & outbound_action_queue_ which will cause memory leak as reported in #23 .

This hot-fix will resolve some of the issues reported.

[shekharhimanshu]

Ideally cyclic references should be avoided. So please consider this as a hot fix only.
I would suggest brushing up class design or using weak_ptr to avoid cyclic references.

[chaurah]

Hi @shekharhimanshu,
Thank you for this contribution. I think tweaking the design would make longer term sense here as you mention. I will look into what is possible while avoiding a delay for the next release. If a design change cannot be made without a breaking API change then I will include this hotfix in the next release.

Please do keep your suggestions coming. They have been very helpful.

Rahul

[vareddy-zz]

Included in v1.1.1.