rename structure_group to translation (also refs in comments)
rename StructureGroup to Translation
rename item_group to line in grammar
rename StructureGroup to Translation (everywhere)
rename "structure_group" to "translation"
rename "structure group" to "translation"
rename "item group" to "line"
rename ItemGroup to Line
rename itemGroup to line
rename item_group to line
rename ItemGroup to Line
rename to Group (abbrev of StructureGroup) to Translation
rename "item group" to "line"
an line to a line
rename group_id to line_id
tidy up use of word "group"
rename "structure" to "block" (also capitalised)
code tidy-up
gem version 0.4.0
rename (unused) structureGroups.corrml