Fix issue when command is one element in list (lxterminal affected).

[k0ste]

Hello.
One arg with 'command' not work with lxterminal, open lxtermianal without telnet session.

Not work:

['lxterminal', '-e', 'telnet 192.168.0.214 32769']

Work as expected:

['lxterminal', '-e', 'telnet', '192.168.0.214', '32769']

[k0ste@WorkStation ~]$ lxterminal --version
lxterminal 0.3.0
[k0ste@WorkStation ~]$ 

This patch make elements separated, should not be a regression with another terminal emulators. But you should check it.
Thanks.

[SmartFinn]

Hello.

This patch conflicts with #8. Also, it doesn't resolve the issue on Debian-based systems where used x-terminal-emulator as a default terminal.