* Catch missing file size in evaluate function and drop only NaN values that are relevant for plotting

* NaviXMon is now skipping read in of data if temporary data from last run is valid and code has not changed

* changed size of plots
* changed location of legend in plots

# Conflicts:
#	navimon/NaviPlotFunctions.py

* changed size of plots
* changed location of legend in plots

* added new calculation of cached percentage and removed old one, cached on site was removed completely

# Conflicts:
#	NaviXMon.py
#	navimon/NaviPlot.py