FMSLogo Code

Refactor the installation script so that all language strings are in the same place and use the LangString command. This makes the code easier to read and easier to localize.

Update the Features and Sources sections based on recent changes:
* FMSLogo doesn't support non-true color displays
* fmslogo.exe and screensaver are both built with mingw-w64 and wxWidgets

Remove the directive to exclude the "CVS" directories when packing the Logolib and Examples directories into the installer. This is a vestige from when FMSLogo's revision control was CVS. Now that it uses Subversion, this is no longer needed.

Update the installer to use the NSIS "Modern UI 2". Among other things, this has a richer UI, a configurable start menu shortcut dialog, and better support for a multi-language installer.

This also implements feature request #37, which is an explicit "done" page in the installation wizard.

Remove a cmd script that used to generate the version.h file. This is now done by the Makefile (for portability to GNU/Linux), so keeping this cmd script around is confusing.

Remove *.c from the source files which "tags" depends on. The Windows version of gmake has trouble with this because there are no .c files and it wants to make a literal '*.c'. And since there no *.c files (anymore) there's no reason for "tags" to depend on .c files.

Note that FMSLogo is entirely built using free (or zero-cost) tools,
now that the Borland OWL version has been removed from the tree.

Add text-decoration to all links so that it's more obvious what is clickable.
This was done mostly to make the links in the howtohelp page more obvious.

Update the HOWTO-BUILD.TXT to suggest only checking out the trunk
of the "logo" project (otherwise, checking out the files takes much
longer and the resulting directory is more complicated, as it includes
all branches/tags from all projects).

Fix the "test" target after refactoring the source code into a different
Subversion project than "extras". This change ensures that you don't need
the "extras" project checked out to in order to run "gmake test" on the
"logo" project.