add news item for git-annex 5.20140306

doc/news/version_5.20140306.mdwn

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+git-annex 5.20140306 released with [[!toggle text="these changes"]]
+[[!toggleable text="""
+   * sync: Fix bug in direct mode that caused a file that was not
+     checked into git to be deleted when there was a conflicting
+     merge with a remote.
+   * webapp: Now supports HTTPS.
+   * webapp: No longer supports a port specified after --listen, since
+     it was buggy, and that use case is better supported by setting up HTTPS.
+   * annex.listen can be configured, instead of using --listen
+   * annex.startupscan can be set to false to disable the assistant's startup
+     scan.
+   * Probe for quvi version at run time.
+   * webapp: Filter out from Switch Repository list any
+     repositories listed in autostart file that don't have a
+     git directory anymore. (Or are bare)
+   * webapp: Refuse to start in a bare git repository.
+   * assistant --autostart: Refuse to start in a bare git repository.
+   * webapp: Don't list the public repository group when editing a
+     git repository; it only makes sense for special remotes.
+   * view, vfilter: Add support for filtering tags and values out of a view,
+     using !tag and field!=value.
+   * vadd: Allow listing multiple desired values for a field.
+   * view: Refuse to enter a view when no branch is currently checked out.
+   * metadata: To only set a field when it's not already got a value, use
+     -s field?=value
+   * Run .git/hooks/pre-commit-annex whenever a commit is made.
+   * sync: Automatically resolve merge conflict between and annexed file
+     and a regular git file.
+   * glacier: Pass --region to glacier checkpresent.
+   * webdav: When built with a new enough haskell DAV (0.6), disable
+     the http response timeout, which was only 5 seconds.
+   * webapp: Include no-pty in ssh authorized\_keys lines.
+   * assistant: Smarter log file rotation, which takes free disk space
+     into account."""]]