Update Plupload to latest version (v2.1.1) from upstream.

Required slight configuration changes to blocks.
Merge branch 'develop' into mage-18
Inegrate core class changes into overridden files.
Remove Cm_Cache_File class
Integrate patched Mage_Backup lib into project files.
Update TinyMCE upgrading patch to match 1.8 core version workspace
Update the tier pricing option patch to match 1.8 workspace.
Integrate Varien_Image_Adapter patch into workspace files.
Remove un-maintained feature patch for compiler autoload
Split base patches into separate files.
Merge branch 'develop' into mage-18
Merge branch 'develop' into mage-18
Update bundle config.xml comments.
Merge branch 'develop' into mage-18
Update CAS account controller to inherit logic from core controller
Use constants for PDF label size.
Remove the Usa helper override, integrated into upstream.
Update Unl_Ship config to match upstream core changes
Update shipping carrier models to match upstream core counterparts
Add more comments to DownloadablePlus module config