Flush out old terminology

[jennyhickson]

Do a final check for any references to:

• trac trac and ticket keyword blat #480 update most references to trac wiki #487
• ticket trac and ticket keyword blat #480
• .rc Keyword flush2 #484
• working copy Keyword flush2 #484
• fcm (some of these might be valid) Keyword flush2 #484
• --source= rose-stem syntax Keyword flush2 #484
• revision Keyword flush2 #484
• dependencies.sh Keyword flush2 #484
• xc40 Keyword flush2 #484
• keywords Keyword flush2 #484
• code system reviewer (loose the system, also make capitalisation more consistent) rehash review process #477
• trunk GitHub and Trunk #482
• github -> GitHub GitHub and Trunk #482

[james-bruten-mo]

I've started from the top down - there are going to be quite a few changes, so maybe a 2nd PR would be sensible

[jennyhickson]

The final item (code reviewer) can be covered as part of the review process rehash, so closing this as complete.