Update timber-menu.php

set $this->has_child_class to true to prevent the class from being added multiple times (was added once per child item)
Add alt property to TimberImage
Add test for TimberImage->alt property
Add missing title as alt text test
Update travis.yml to test against WP 3.8.1
Revert back to WP 3.5.1 in travis
Removed Admin Section. Yay! Less bloat
added test for #169
Updating change logs and version number
fix link to image
Added TimberTest::testGetPostPreview

Test creates a post and a preview and sets the appropriate GET params for previews. It eventually checks if it gets the content from the autosave, instead of from the original post.
Add Timber::maybe_set_preview and call it in Timber::get_posts

Added the method maybe_set_preview, largely based on WPs internal _set_preview function. Checks if the GET params call for a preview and if the current user is allowed to edit the current post. It scans the posts array for the previewed post and if present replaces it by the last autosave by the current user (again, if available).
Force non-404 headers as soon as possible

If force_header is set in Timber::load_template and it's not 404, make sure it happens as early as possible. The overrides used to be called at normal priority (10), but plugins that do stuff with 404s may use the same hook at default priority.
Remove extra error log
Merge branch 'post-previews' of github.com:mgmartel/timber into mgmartel-post-previews

* 'post-previews' of github.com:mgmartel/timber:
  Add Timber::maybe_set_preview and call it in Timber::get_posts
  Added TimberTest::testGetPostPreview
added current property to pagination
Merge pull request #175 from mgmartel/set_force_header_earlier

Force non-404 headers as soon as possible
Merge pull request #166 from jaeh/patch-1

Update timber-menu.php
TimberImage alt() function without automatic fallback
Merge pull request #168 from jnweaver/alt-text

Add alt property to TimberImage