copyedit, remove some outdated examples
whitespace, remove remaining @code{}
fix typo
fix links, make headings consistent grammatically
update 'Updating Status Strings'
update 'Creating LogFiles'
update 'Reading Logfiles' to say, basically, don't
update relnotes to indicate that LoggingBuildStep is deprecated
change getCurrentSummary to return a dict like getResultSummary
update cls-buildsteps.rst
typo