Restore Brain F**k Scheduler (BFS)! (testing)

This reverts commit f0321e0b3f1086fa0e1e527d09bb62796f141f6c.
Updated BFS to v0.413

This reverts commit dedbfcf05960521b92279a817c5bbe4d986b9b66.
Add above_background_load function to allow stuff to happen only when

This reverts commit 5f02faf8967f8b01be9fab987f746a7b74cff03b.
Tweaked BFS
Updated to Linaro 13.01 toolchain!
lowmemorykiller: +testing
defconfig: enable bfs again!