removed unused code

fixes #89 - this adds basic graphs and charts for your inventory, it
also includes minor changes to the dashboard graphs

fix spelling mistakes, comments etc - minor refactor

fixes #83, envirionment is hash by it self, not a parameter

fixes #68 ; wrong condition was used again

fixes #68 ; wrong condition was used

fixes #83 - add environment to external nodes parameter

fixes #68 - do not force to key in all unattended related info when using Foreman as a simple node

fixes #76 - Foreman creates a link to a report even if the report is already deleted

first stab at #77 - add basic graphing engine and added a couple of graphs in the dashboard