Fix typo

Not sure what you meant by "conference", maybe "reference"?
Improve punctuation
Improve English
Merge pull request #332 from lem9/master

Improve English
Translated using Weblate (Slovenian)

Currently translated at 98.8% (853 of 863)
Merge remote-tracking branch 'origin/master'
List Weblate version as well in list_versions command
Fix test descriptions
Include links to ttkit's documentation of formats

This also shows some examples PHP (issue #328).
Mention PHP files are usually monolingual (issue #328)
Do not mess up with location data from PHP files (issue #328).
Clearer field description
Update po files
Improve contributors guide
Better formatting
Translated using Weblate (Dutch)

Currently translated at 100.0% (863 of 863)
Indicate new suggestion only after string match
Include unit counts in import message
Translated using Weblate (Dutch)

Currently translated at 100.0% (863 of 863)
Merge remote-tracking branch 'origin/master'