Fixed a Wing3d crash related to Area Light - by trying to edit its property or saving the project Wings3d was crashing.

The bug was introduced when I tried to fix an issue related to unhiding adjacent faces with other material than default one (on mv/bugs1.5.pre1b - https://github.com/dgud/wings/commit/5ee5a9d89ab035fa2ed5a93412b55fb74ffbae5e)
Update wings_jp.lang

Now time,I chaned many expression of command name and informaion strings based on my dictionary project.
Update autouv_jp.lang

Some strings fixed and, translate (re-unfold:5)
Mac OS X: Correct copying of the 'cl' app

The location of the cl_nif.so file has changed.
Eliminate the need to set ESDL_PATH

It is already necessary to use ERL_LIBS to for the cl application,
so it easier if we handle the esdl application in the same way.
BUILD.unix: Update build instructions
Linux: Correct copying of 'cl' app

The location of the cl_nif.so file has changed.
Merge pull request #53 from tkbd/master

Translation update for Japanese Language
Merge pull request #51 from Micheus/mv/bugs1.5.pre1d

Fixed area light crash