Pidagad

Adds Pidagad.
Fixes  output formatting  bug  in Systems  Summary
Statistics.

 On branch master

 Changes to be committed:
	modified:   Ltt/Display.pm
	modified:   json/hdd_types.json
	modified:   json/systems.json
	modified:   ltt-rankings.txt
.gitignore

 On branch master
 Changes to be committed:
	new file:   .gitignore