fixes #309
fixes #311
fixes #310
add DAWN as analysis project in it's own right
typo, update the copyright dates
Merge branch 'master' of https://github.com/nexusformat/definitions
update the copyright date
fixes #303
* move Preface between introduction and motivations
* remove the "Preface" part since the content is redundant
move the examples up
fixes #312
add spec2nexus to Utilities
index it!
remove section singleton heading