Added clarification on 'northdirection' that it has to do with viewpoint angle
Merge pull request #979 from PotcFdk/master

Fixed a typo ('leve' -> 'level').
It helps if we print the error message
Add explanation about HTTPS
Merge pull request #980 from tswsl1989/https-explanation

Add explanation about HTTPS
Merge pull request #981 from tswsl1989/pngit

It helps if we print the error message
Merge pull request #977 from jandahl/patch-1

Added clarification on 'northdirection' that it has to do with viewpoint...
Fixed cave render for solid unknown blocks.

is_transparent returns 1 for every unknown block because that's an easy way to
make them ignore lighting, however, this makes cave render useless with a map
containing unknown ores.

The definition is_known_transparent checks whether a block is transparent and is known.

This is a workaround, a proper fix would be to have unknown blocks be neither transparent nor
solid. Or make them both. But don't prefer one of the two.
Merge pull request #988 from CounterPillow/ftb-cave-fix

Fixed cave render for solid unknown blocks.