added multi core support for cpu usage
fixed typo and updated README
removed unnesecary code duplication in cpu_usage_bar, added multicore support for cpu_bar and fixed typo in cpu_usage
updated README
updated docs
Merge pull request #96 from Arvedui/cpu_usage_multicore

cpu_usage Multicore support
Update README #75 / #96
added ngb module
changed ip for internet ccheck to wikipedia