Remove rogue fullstop.
Merge pull request #795 from arjclark/cylc-pres-typo

rose documentation: remove rogue fullstop from cylc slides
doc: use terms like `logs`, `STDOUT`, `STDERR`

The general term `output` may be confusing, because it can mean other
items generated by a program. Where possible, use specific terminology
for log files.
log: improve terminology.
rose date: fix offset and print_format usage

It was failing when both were used together.
Merge pull request #797 from matthewrmshin/log

doc: use terms like `logs`, `STDOUT`, `STDERR`
Merge pull request #798 from matthewrmshin/fix-rose-date-offset-print_format

rose date: fix offset and print_format usage