Abort build if there are no changes since the previous one
Revert "Abort build if there are no changes since the previous one"

This reverts commit 29c92b1224e360c8583ab914b6f9344ddf01a3e7.
Revert "Revert "Abort build if there are no changes since the previous one""

This reverts commit 7f00736a8297974c64ecd717eaefe391ce3a38e7, fixed
by forcing bash as the script's shell
Kill warning about missing file
Merge branch 'master' of git://github.com/CyanogenMod/hudson