Add writing conveniences

[noelwelsh]

• Consider changing write to print, to match Scala names
• Add convenience writeLn (or printLn) and perhaps newline. Remember we need to send the terminal "\r\n" to move to the next line
• Add more conveniences that usage shows the need for

[kapunga]

I agree that print would be more consistent with expectations.

Remember we need to send the terminal "\r\n" to move to the next line

This might be annoying for an end user to remember. We may want to add a mode where \n outputs \r\n. Looking at termios.h I think we can add ONLCR to c_oflag in native as according to documentation when it is set, there terminal will 'Map NL to CR-NL on output.'.

[noelwelsh]

I feel there is tension here between going with the terminal's default behaviour (less surprising to people who know the terminal well) and Scala's default behaviour (less surprising to Scala developers). I see two ways forward:

1. We provide println etc. which brings the correct codes to the terminal. If you don't use them you have to write the "\r\n" yourself.
2. We set the terminal flags to get the same behaviour as Scala (i.e. "\n" becomes "\r\n"). I'm not sure we will be able to support this on all platforms, though.

[kapunga]

I think maybe for println we should make sure \n becomes \r\n and keep print etc. the same for the following reasons:

• println is more likely to be used when someone is just dumping output to the screen and even people familiar with the terminals behavior might forget to use it in this case.
• println is more likely to pass through blocks of text as parameters that come from external source. They are more likely to just have \n in them and it would be annoying to have to remember to replace them.