Updated kernel to 3.11.0. (Kernel binary not included for now. I'll include it when CPUstress is ready for release.)
Edited 'prepare' script to support any version of glibc.
build and extract: Add braces in variables to improve readability.
Redirect error messages in scripts to &2
pack_buildtxz.sh: Now supports bsdtar.
pack_buildtxz.sh: Use ustar format and sort file names before packing.