Updated FTN5 (HTTP integration) and FTN6 (Executor Concept)
Added HTTP context object description to FTN5
Updated FTN5 & 6

* FTN6 - Added concept of Communication Channel Context
* FTN5 - Updated HTTP Channel Context definition
Updated FTN6 Executor API
Updated FTN5
Simplified FTN5 GET/form parameter coding restrictions