[Feature Reqest] Get cursor position

[Zooce]

I'm running into an issue where '\r' is being mapped to '\n' when running a program in urxvt via Cygwin. My idea to work around this is to just set the cursor position to column 0 of the current line. However, I can't get the current line with console.

Ideal usage:

let mut term = console::Term::stdout();
let (_, y) = term.get_cursor_pos()?;
term.move_cursor_to(0, y)?;

Possible Alternatives:

1. Add move_cursor_left and move_cursor_right. This complements the already existing functions move_cursor_up and move_cursor_down. Although in the use case I'm talking about, there's still extra work the caller has to do if they want to move "all the way" left or right.
2. For convenience add, move_cursor_to_start and move_cursor_to_end (or something similar). Not sure on the naming here, but the idea would be to have functions that move the cursor either to the very beginning of the current line or the very end.

[pnmtjonahen]

See my PR

[pksunkara]

Merged the PR