The type of winsize.ws_col and winsize.ws_row is unsigned short, so
change python's struct.unpack format from 'hh' (short) to 'HH'.
Otherwise, we can only test sizes up to 32767 when actually sizes up to
65535 are supported.
Makes for pretty paths when extending scripts:
`extends "res://addons/godot_xterm/terminal.gd"`
vs.
`extends "res://addons/godot_xterm/nodes/terminal/terminal.gd"`
Currently "res://addons/godot_xterm/pty.gd" is acutally `pty_unix.gd`.
This is okay for now as the PTY node is only supported on Unix
platforms. However, we will need to sort it out when adding Windows
support as part of #25.
Also remove the GDXterm namespace.
- Enable tests for osx.universal platform.
- Export HTML5 (but skip upload as .cast files aren't exported
properly).
- HACK: Use HTML5 export to generate .import directory for tests
This way we don't get an error message even if using
`continue-on-error` set to `true`.
Currently tests only run on X11.64 platform.
But other platforms can be supported with a bit of effort.
Remove default bell sound as it does not play nicely with CI environment
that does not have sound card.
