Updated Interacting with code (markdown)
Create pointer to new topic on main site
Destroyed Interacting with code (markdown)
minor markup changes
Build `SIZE` from fundamentals of ArrayView
clarify use of underscores
Added a quick note with regards to EM_ASM not accepting double quotes. Reference https://github.com/kripken/emscripten/blob/6010666be99cd0322babba1174cfbc65c776deb5/system/include/emscripten/emscripten.h#L21
Add notes on setting environment variables