Update ALL the langs

Changelog:
- Deleted empty lines at the ends of the files.
- HellBark corrected to Hellbark (because it called Hellbark in BiomesOPlenty en_US.lang)
- Holy and Loftwood stuff renamed to Ethereal (Loftwood renamed to Ethereal in the latest BiomesOPlenty en_US.lang) you can check it here: https://github.com/Glitchfiend/BiomesOPlenty/blob/BOP-1.7.10-2.1.x/src/main/resources/assets/biomesoplenty/lang/en_US.lang
- Updated ru_RU.lang (How without it?) Also, for Russian translators: Don't. Change. "Redstone". Translation. To. Something. Please.
- Popular corrected back to Poplar, again.

Also, is line 122(item.seatBack.Palm Seat Back.name=Palm Seat Back) in en_US.lang correct? Maybe it should be item.seatBack.PalmSeatBack.name=Palm Seat Back ?