dillon1000/react

Renderers can schedule commit-time effects for initial mount

The finalizeInitialChildren HostConfig method now utilizes a boolean return type. Renderers can return true to indicate that custom effects should be processed at commit-time once host components have been mounted. This type of work is marked using the existing Update flag.

A new HostConfig method, commitMount, has been added as well for performing this type of work.

This change set is in support of the autoFocus prop.