index.html: add warning message about hostname/cookie storage problems
 * Fixes https://github.com/sebsauvage/Shaarli/issues/196
 * Fixes https://github.com/sebsauvage/Shaarli/issues/97
Update README:
 * Add screenshots
 * Use Mediacrush as a CDN for images to reduce load on sebsauvage.net
 * Improve page layout/sections
 * Reorder list of features
 * Add links to wiki and bug tracker
 * Add proper download links for stable/dev channels
 * Improve copyright/license notice
Add Archive.org integration
 * adds an "archive" link next to permalinks, linking to the last version of the page on archive.org
Merge pull request #43 from nodiscc/archiveorg-integration

Add Archive.org integration
Merge pull request #39 from nodiscc/master

add warning about hostname/cookie storage problems during install
Merge pull request #42 from nodiscc/new-readme

Update README
make archive.org integration optional (ARCHIVE_ORG option, defaults to false)
add READITYOURSELF_URL config variable
add README
add linklist_plugins placeholder config variable, set readityourself default url to readityourself.net
test raintpl condition, display readityourself link if plugin enabled
fix typo in url
urlencode
this is not how it works this is not how any of it works