[misc] Optimized PNG images (reduced size)
[misc] Optimized GIF images (reduced size)
Swapped conditions to get all the builds in timeline graph.

Since the builds are sorted from most to least recent, the limit
method discarded the builds not in the same day as the last one.
Added test for byTimestamp method in RunList.
Fixed indentation.
[FIXED JENKINS-16846] fix logic and add test

FilePath#moveAllChildrenTo faild,
when same name directory exist.

change Void to void, recursive_invoke is internal helper function.

thanks review by jglick
JENKINS-15178: Enabled log rotation on Mac OSX
Exclude the extraneous xmlpull and xpp3_min dependencies in jenkins-core.

The xpp3_min artifact causes a "JBAS015893: Encountered invalid class name" error on deployment in JBoss AS7 due to a malformed manifest in the artifact. The xpp3 artifact is extraneous since the xpp3 library is a direct dependency for jenkins-core. The xpp3 library replaces the xmlpull library.
Method getComputers() does not return computers for label expressions.
Take subtasks into account when deciding to provision new nodes
[JENKINS-17510] Adding SecurityContextExecutorService - a wrapper to provide security context to each executor
Adding license and description to SecurityContextExecutorService
Changed eclipse default from tabs to spaces
Changing methods to correctly wrap the runnables and callables rather than the service itself
Adding basic test and rebasing
[JENKINS-17510] Adding SecurityContextExecutorService - a wrapper to provide security context to each executor
Adding license and description to SecurityContextExecutorService
Changed eclipse default from tabs to spaces
Changing methods to correctly wrap the runnables and callables rather than the service itself
Adding basic test and rebasing