Added large strings (with spaces and " or ') and better ls

- Added a parser for strings between " or '
- In cakefile, added 'src/shell/' folder to watch build
- Now you can pass a custom port as an argument after --http
- ls command now can print folder contents from directory given in an
argument
- ls can also print more than 1 folder contens given with some arguments
- Added a new helper function: errorFormatNNL(cmd, arg, msg), same as
errorFormat(cmd, arg, msg) but without using newLine()