Creates a .gitignore to avoid generated files.
Adds hyperlinks to profile pages.
Changes forum's header links.

The forum link is now the first item, the homepage is now second along
with other useful links like documentation and github issues.
Implements rss for thread activity.
Merge branch 'pr_hyperlinks_user_profiles' of git://github.com/gradha/nimforum into gradha-pr_hyperlinks_user_profiles
Merge branch 'pr_changes_header_links' of git://github.com/gradha/nimforum into gradha-pr_changes_header_links
Merge branch 'pr_implements_rss' of git://github.com/gradha/nimforum into gradha-pr_implements_rss
Features to improve cooperation with webcrawlers.

Added proper titles to each page, page 1 of threads and posts lists now
redirects to /.