Put class docstring on single line
Added EchoMem class
Added mirroring writes to echo space to RAM space
Spaced out top-level global variables
Fixed syntax according to PEP8 coding style
Fixed syntax according to PEP8 coding style
Fixed syntax according to PEP8 coding style
Fixed syntax according to PEP8 coding style
Fixed syntax according to PEP8 coding style
Fixed syntax according to PEP8 coding style