CHANGELOG.md: add unpublished Shaarli Community releases

Relates to https://github.com/shaarli/Shaarli/issues/663
See http://keepachangelog.com/en/0.3.0/

These entries correspond to the first lightweight tags present on the
Shaarli Community repository. As there are no corresponding release (notes),
the changelog is based on relevant elements from the Git commit log.

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

CHANGELOG.md

@@ -316,3 +316,56 @@ This release has been YANKED as it points to a tag that does not follow our nami
 ### Security
 - Do not leak server's PHP version and Shaarli's full path on errors
 - Prevent Shaarli from sending a lot of duplicate cookies
+
+## [v0.0.42beta](https://github.com/shaarli/Shaarli/releases/tag/v0.0.42beta) - 2014-07-27
+### Added
+- Add QRCode Javascript library
+- Allow importing bookmarks with the same timestamp (hack)
+- Allow putting a description in the bookmarklet URL
+- Add `json_encode()` implementation for PHP<5.2
+- Highlight search results
+
+### Changed
+- Improve 'Stay signed in' behaviour
+- Improve `smallHash()`
+- Refactor QRCode generation
+- Update Javascript lazyloading
+- Update CSS
+
+### Removed
+- Remove jQuery from almost all pages
+
+### Fixed
+- Fix overlapping tags
+- Fix field foxus in the bookmarklet
+- Fix error message when `data/` is not writable
+- Fix HTML generation
+
+### Security
+- Fix XSS flaw
+
+## [v0.0.41beta](https://github.com/shaarli/Shaarli/releases/tag/v0.0.41beta) - 2013-03-08
+### Added
+- Add HTTPS to the allowed protocols
+- Add support for magnet links in link descriptions
+- Allow creating new links as private by default
+- Allow disabling jQuery
+- Check write permissions
+- Check session support before installation
+
+### Changed
+- Improve token security
+- RSS feed: allow inverting links/permalinks
+
+### Fixed
+- Fix display issues during installation
+- Fix popup redirection after login failure
+- Fix RSS formatting for Thunderbird
+- Fix thumbnail creation
+- Fix cache purge
+
+### Security
+- Fix login issue with WebKit browsers
+
+## [v0.0.40beta](https://github.com/shaarli/Shaarli/releases/tag/v0.0.40beta) - 2013-02-26
+Initial release on GitHub.