very basic drepl implementation
implement web terminal
prettify error messages
use mkdtemp if possible
factor out common code

- add mod0 with common declarations
mark declarations explicitly as public

- for imports
split server in vibe.d and sandbox interpreter
remove unused function
minify css and js code

- used uncss to reduce bootstrap.css

- did a few modifications manual

- ran YUI compressor

- import files directly into HTML output
cosmetic changes
workaround Issue 11543 - multiple modules...
fix multiline response

- terminate response by empty line
fix empty line handling

- ignore empty lines if no incomplete input is pending

- otherwise abort input after 2 consecutive empty lines
bind default HTTP ports
add TODO