draft
moving on
first draft
typo
note on IoC
Updated most behavior to step

Modified the intro text
add missing ---
Updated the introduction for the pipeline.
replacing the jpg image with the png version
Updated how the pipeline works, how to add or replace existing behaviors.
Fixed bullet formatting
Moved the text regarding diagnostics to the Diagnostics section.
typos
typo
description of each default pipeline step
comenting on the execution order and the ability to replace/remove built-in steps
adding "beta" disclaimer
Added more clarification, changed code to comply with the v5 changes.
Removed the beta disclaimer.
Added more clarification on the dynamic nature of the pipeline steps and made the steps a bulleted list.