Create a wiki for documenting how to install XS modules

[hakonhagland]

Continuing the discussion from #139 (comment)

The suggestion is to use GitHub wikis to document how to install XS modules with strawberry perl. For example a main document "Installing-XS-modules.md" with links to sub documents for specific modules, like "Image-Magick.md". See #139 for an example.

As I understand, there might also be some drawbacks of using the wiki instead hosting the documentation in the main repository, see for example https://stackoverflow.com/q/10642928/2173773

[shawnlaffan]

Documenting the build of XS modules is a good idea. Gtk modules also come to mind.

Wikis do have issues, but are probably a good way to reduce churn in the git history during drafting. The final version can then the shifted across to the main repo. Although one can also force push a PR as changes are made so maybe it's not such an problem.

[shawnlaffan]

One thing to keep in mind is that, unless we exclude them, the files will end up on metacpan as part of the Perl::Dist::Strawberry dist.