[patch] Clarify installation alongside Windows

[Timo Jyrinki]

Hi. Attached is a patch, discussed with xivulon on IRC, that would add additional text " to install $distro either alongside Windows or as the only operating system." in the end of "Demo and full installation" description text. The reasoning is that currently the wubi installation method has clause "You will be able to boot into either Windows or $distro.", while Demo and full installation has nothing - this might falsely lead first-timers to believe that in order to continue using Windows they have to install Ubuntu inside Windows.

An alternative to adding this text/patch would be to remove that sentence from the wubi part... but if this text fits, it give a bit of additional information.

Ps. the patch has a Finnish "diff comment" in the bottom of the patch about missing newline, please ignore it :) ("\ Ei rivinvaihtoa tiedoston lopussa")