added source and language fields
add readonly view for source
ensure sourceform is shown in admin when adding
fix missing imports
added language to filter
update admin display options
tweak post translation page
more tweaks to post translation page
add translation to guides
allow filtering by source
version bump for unicore-gitmodels
Merge pull request #8 from praekelt/feature/issue-8-content-authors-add-translations

content authors need to be able to add translation