Performance updates which include:
- Echo.Configuration: added an ability to skip a given keys from heavy processing (copying)
- Echo.Control & Echo.Plugin: excluding the "data" and "parent" from heavy processing
- Stream control: optimized Item configuration assembling
Echo.Configuration & Echo.Plugin - renaming "keepRefs" -> "keepRefsFor" (within F:1334)
Echo.Configuration - prevent dealing with cache during the instance creation, because cache is empty at that moment (within F:1334)
Merge branch 'andrew/1334-skip-data-and-parent-copying' into rc3.0.9