Instead of asking the user to rebuild the library, now it is possible
to build the library in both release and debug modes and to have both
versions of the library compiled at the same time.
Rendering NEA files has a terrible performance. Instead of trying to
support both formats, remove NEA and replace it by DSMA.
Some function signatures have changed to adapt to the new system.
"NE_ANIM_UPDOWN" has been removed because it's redundant: Just modify
the animation before exporting it from Blender.
Rather than making the print function insert a newline after every
message, send the newline from the engine.
Custom error message handlers need to be adapted for this change. If
they were inserting a newline after every message, it is no longer
needed.
With a bit of help of `indent -linux`, but mostly by hand. Also used
`iconv -f ISO-8859-1 -t UTF-8//TRANSLIT` to convert to UTF-8.
There is still some refactoring left to do.
