switches global setting var to be a constant var - refs #100

fixed formatting

fixes - #120 - Include timestamp of dashboard page generation

fixes #108 - Move "Total" line to bottom of list and emphasize it

First stab at fixing feature #87

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

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

fixes #70 - shows hosts in error state in the dashboard

added delete link from report show action