README: about the initial purpose of this project.
log.go: simple wrapper for the log pkg.

To get something like log level.
Start point: accept client request.
Colorize debug log.
Basic GET proxy working.

Need to know how to handle HTTP headers.
Low-level TCP. Client request parsing.
Add .gitignore
HTTP server response status 200 should work.
Merge branch 'feature/use-socket-for-server' into develop
Faster http request generation.
Lower case before split when parsing header.
Code refactor.
Parse content length in response.
Refactor: put request handling in http.go
Better debug message.
Add / if path is empty.
Custom ParseRequestURI to avoid path escaping.
Refactor: extract request header parsing.
Buffer raw request directly.
Send request body while doing request.

Avoid using more buffer memory.