Several updates

[tshort]

• Update the Lorenz example to be able to just use solve!(integ)
• Support aliasing objects in globals
• Add aliasing tests
• Add project ideas
• Add a README for src
• Add hideon/hideoff capability for Literate files
• Rework returns to drop returned results not used
• Rework returns and lookup of singleton types (it may still be wonky)
• Add an overlay for fill!(a::Union{Array{UInt8}, Array{Int8}}, x::Integer) for Dict support (avoiding memset)
• Add a dict test