! 1 week is the same as 7 days... I think!! (install.sql)

! Fixed readme text. (install/readme_install.html)

- Removed main .htaccess file from install folder, now that it's created automatically at install time... I think!! (install/.htaccess)
- Oh, yes, the index was still creating $boarddir, $cachedir, $cssdir and $jsdir... Well, off with their heads! Use constants now! (index.php)
! I'm not sure what made me think I was done with removing $cachedir and $boarddir from Wedge... Let's not talk about it, okay? (SSI.php, Subs-Cache.php, Subs-Plugins.php, install.php, install/ssi_examples.php)