Updated EN translation file for transifex

String freeze for 1.6.
Fixed motion title in motion list view (#1148).
Merge pull request #1308 from emanuelschuetze/fix-motion-title

Fixed motion title in motion list view (#1148).
Merge pull request #1307 from emanuelschuetze/en-translationfile

Updated EN translation file for transifex
Fixed #1311 (Motion poll slides shows wrong value for Abstain vote)
Changed agenda csv demo data.
Updated final translations for 1.6 (DE, FR, PT, CS)
Merge pull request #1312 from emanuelschuetze/fix-1311

Fixed #1311 (Motion poll slides shows wrong value for Abstain vote)
Merge pull request #1314 from emanuelschuetze/agenda-demo-data

Changed agenda csv demo data.
Merge pull request #1315 from emanuelschuetze/translations

Updated final translations for 1.6 (DE, FR, PT, CS)