Use US English in hotpixels

Credits go to Moritz Moeller for finding this.
Merge pull request #355 from MRIG/master

Updated Dutch translation
Update French translation.
usermanual: a few changes
[l10n] Swedish update
Resolve memory leak of 'border_init'
Try to load profile names that are not ASCII
Merge pull request #357 from mlq/feature/memory-leaks-01

Resolve memory leak of 'border_init'
a certain phrase repeatedly uniformly translated