WorkspaceSnapshot now uses the tar.gz format to handle symlinks
correctly.

Tar/untar now correctly supports symlinks.

Fixed the file overwrite problem on Windows.

Absolutizing on the server side is easier and more compact.

http://jenkins.local/job/JOBNAME/configure will become
10%-faster in Chrome 14 and 20%-faster in IE 9.

$(e).next() may return undefined.
If 2nd argument of insertBefore is undefined,
IE9 complains "SCRIPT87: Invalid argument".
To insert newChild at the end, 2nd argument should be null.
http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-952280727

If we fail to obtain the update center metadata, don't keep retrying
every 15 seconds, but use exponential time out to avoid overloading
our server in case of a problem.

done with post-production (as opposed to just done with build steps). Jobs
that had long running tasks that occured in their post-production state, i.e.,
build wrappers, post-build steps, could get into the situation where a queued
build would start running on an executor while the previous build was still
running post-build actions. If the two executors shared the same workspace,
the new build could delete information with a clean that the current build
still needed for processing.

- Changed AbstractProject.getCauseOfBlockage() to call isLogUpdated instead
  of isBuilding.

   core/src/main/java/hudson/model/AbstractProject.java

- Added isLogUpdated.

   core/src/main/java/hudson/model/Job.java

- Added test case.

   test/src/test/java/hudson/model/JobQueueTest.java

- Change log

   changelog.html

This hopefully avoids showing menus when the user didn't intend to see
them