Merge branch 'release/v0.3.8' into develop
add support for i18n comments in the same line as the gt call

if there is a comment right before the gt call, it should also be treated
as a i18n comment. Until now, only comments in the lines above were
considered.

This slows down the parser a little bit, because more information needs to
be extracted into the AST.
bump version and update readme
Merge branch 'release/v0.3.9'