Guard against empty list-items in base.tmpl

If the license/search_form are blank, don't show a list-item for them.
Fix spelling of 'prevlink'
Add Tim Chase to AUTHORS.txt
Fixes Issue #941 Any theme in chain can contain targets file, and
site root can contain sass\less directory with uncompiled files
and targets file
Merge branch 'master' of https://github.com/getnikola/nikola

Conflicts:
	CHANGES.txt
Merge branch 'master' of https://github.com/getnikola/nikola
Merge remote-tracking branch 'upstream/master'

Conflicts:
	CHANGES.txt
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:ermeaney/nikola
Fix drafts being leaked in feeds.

This commit is a simple fix to work around the way `doit` seems to
handle file dependencies - if a file was a dependency for a task prior
to this run, but is no longer a dependency, the task is not run,
again. Only, the file dependencies in this run are checked for
changes.

We simply check use_in_feeds status for all the posts, to discover any
changes and regenerate the feed.

Fixes #934
Merge remote-tracking branch 'upstream/master'
import wordpress' posts inclusive folder structure in the url

imports 2012/09/01/hello-world as 2012/09/01/hello-world,
not as 20120901hello-world

fixes #693
add changelog entry for #693
add myself to the contributors list
fix test_importing_posts_and_attachments for the new url structure
Merge pull request #1012 from evgeni/issue-693-wordpress-import-urls

import wordpress' posts inclusive folder structure in the url
update AUTHORS.txt [ci skip]

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
remove debugging print
Fix #655
flake8