Merge pull request #27 from virtualtam/master

fix: add missing slash when defining RainTPL's temp dir
add link: in case of empty URL (self-post), prepend "Note: " to the title
 * Thanks to qwertygc (https://github.com/shaarli/Shaarli/pull/23)
 * Fix small typo
Merge pull request #30 from nodiscc/master

add link: in case of empty URL (self-post), prepend "Note: " to the title
add current release version number in shaarli_version.txt
 * release process: please update this file when releasing a new version on github
update check: check against last version available on github.com/shaarli/Shaarli
 * fixes https://github.com/shaarli/Shaarli/issues/5
Merge pull request #31 from nodiscc/version-check

Version check: check against latest version on github
Make ATOM toolbar button optional
 * ATOM button display is now configurable using the SHOW_ATOM variable in index.php or data/options.php (defaults to false)
 * Fixes https://github.com/shaarli/Shaarli/issues/24
thumbnails: force HTTPS for youtube, imgur, vimeo
 * other services also provide thumbs over HTTPS, but the rewrite expression is more complex, so left out for now
Merge pull request #35 from nodiscc/optional-atom

Make ATOM toolbar button optional
Merge pull request #36 from nodiscc/https-thumbnails

thumbnails: force HTTPS for youtube, imgur, vimeo