FreeBSD, Darwin: _lp_cpu_load improvements
FreeBSD, Darwin: _lp_cpu_load improvements

FreeBSD: fixed _lp_cpu_load
Darwin: optimized _lp_cpu_load

Note that this change may break syntax coloring in Vim if Vim is not
configured to read the file as 'bash'. Workaround: create a symbolic
link with a '.bash' extension and open that file.

joshuarubin/dotfiles,pkkolos/liquidprompt,jonathanjsimon/liquidprompt,joshuarubin/dotfiles,lyoshenka/liquidprompt,elementalvoid/liquidprompt,tstone2077/liquidprompt,nojhan/liquidprompt,joshuarubin/dotfiles,tkuminecz/liquidprompt,BobHood/liquidprompt,dan-cleinmark/liquidprompt,enrdstrm/liquidprompt,dtschan/liquidprompt,tsbarnes/liquidprompt,laurentbardin/liquidprompt,timhyson/liquidprompt,colinlieberman/liquidprompt,illwieckz/liquidprompt,joshuarubin/dotfiles,dpilone/liquidprompt,tocomo/liquidprompt,kenrachynski/liquidprompt,mathieumd/liquidprompt,milouse/liquidprompt,smadhueagle/liquidprompt,alexprengere/liquidprompt,jaesivsm/liquidprompt