Fix broken link to markdown quick ref
Fixes #463
Merge pull request #490 from pgiraud/markdown_help

Fix broken link to markdown quick ref
Prevent private projects to be exported as JSON
Enable CORS for tasks json export
Fixes #451
Merge pull request #507 from pgiraud/cors

Cors
Update l10n sources
Update l10n resources
Merge pull request #509 from dodobas/l10n_update

L10n update
Bumping version 2.9-dev