Review and update training slides

[szymontrocha]

During ASTRON workshop we realized parts of usual slide deck is outdated and should be updated. This was also pointed out by some participants. This ticket is to list and follow possible places or topics where we should modify:

• [ ] hardware specification and suggestions

• [ ] use cases and graphical examples

• [ ] extend maddash information

• [ ] update bundle graph

• [x] add history timeline

• [ ] update architecture picture

• [ ] consolidate pscheduler decks and add some explanations about the different scheduling classes

• [ ] make them more fancy where possible, add some form of graphical representation than lots of text. There are not only computer nerds in the audience :-)

• [ ] Update examples with newer images/stories

In Installation and Basic Configuration v5:

• [x] slide 32: badly mangled text overlay
• [x] slide 30-32, 34 have key parts of text obscured by images

In Measurement Tools v4:

• [ ] slide 7: claims the default for CLI is iperf2 but probably iperf3
• [ ] slide 11: claims to use iperf2 but CLI shows iperf3
• [ ] slide 33-36: update to pscheduler instead of bwctl/traceroute

In Security and Operations:

• [ ] Mention new way of setting web access users (htpasswd)
• [ ] Mention taking care of central archive free disk space (cassandra compacting case when disk is already full)
• [ ] This deck should be minimized to avoid too much cartoons
• [ ] Eliminate anything not perfSONAR (directly) related

[laeti-tia]

From the ASTRON workshop I have updated some MaDDash and pScheduler materials.

[szymontrocha]

See also #151 and #158

[szymontrocha]

Adding here items from #86

[szymontrocha]

Adding here items from #151

[szymontrocha]

These slides are already old due to the latest release and there should a new set instaed of modifications