[Windows] Change Installer name to hint full and net version

[RattleSN4K3]

Currently, the installer is named like "ultrastardx-1.1-installer-full.exe". It states as being the full installer. However, songs and themes are not included, they require a download (within the installer).

I'd suggest to change the name from now on to a name with the ending of "-net" and keep "-full" for the full installer including every optional song and theme (and other content) from the repo and dev community.

• ultrastardx-1.3-Beta-installer-net.exe
  Includes basic game without any additional theme and no songs
• ultrastardx-1.3-Beta-installer-full.exe
  Includes the basic game plus additional songs and themes (these from Sourceforge; the optional download from the net installer)

Edit: Typos

[RattleSN4K3]

Or "lite" or any equivalent for "net".