Update wings_jp.lang and hiline_jp.lang

wings_jp.lang (+4 squashed commits)
*Update Help message and Tweak commands strings.
*Remove un-used data
*Update and improve translation (Selection groups,Area & Volume etc)
*Did the translation of untranslated part.

Update wpc_hlines_jp.lang 2 string change
*wpc_hline:dialog:26 Change the representation more understandable text.
*wpc_hline:export:2  Change to English String for avoid bug... Because Wings3D's OSX Native dialog not work with Non Latin charactors.
It was added a new option Rotate to the command Snap Image. Thanks to boredom who asked for and oort for testing.
Fix JPG import on Mac

NOTE: JPG import now works on the Mac.
Merge pull request #68 from Micheus/mv/snap_image_rotate

Added new Rotate option to Snap Image command
Merge pull request #60 from tkbd/master

Update wings_jp.lang and hiline_jp.lang
Fixed some bugs reported for Wings3d 1.5.2

During some tests with Collada plugin - because of some issues related to the normals exported - it was noticed some inconsistences in the file generated. I used the smllint parser with Collada 1.4.1 schema (on-line | http://collada.org/mediakiki/index.php/Schema_validation):
- the "library_image" session has been exported with no images/texture in the scene and generating an inconsistent id (ID="-img") for the "image" session;
- for the material ("phong"), the diffuse attribute has been written in the wrong order.
- the parser has pointed that the "node"'s id was not unique. It was noticed that it was the same used for its "geometry"'s id.

In order to applay the fixes it was used the "COLLADA Digital Asset Schema Release 1.4.1 Specification (2nd Edition)" and parsed on-line, as well the ".dae" file was read using a 3rd software.

NOTE: Fixed an issue related to edges highlight in Tweak and Sculpt that was crashing wings when the object have hidden faces or holes. Thanks to Extrudeface for report it.

NOTE: Fixed a issue related to Select Group and Saved Camera windows not be drawn using the alpha settings as defined in the preferences. Thanks to Justanother1 for report it.

NOTE: Fixed the duplicated IDs in the language file for "Rename" operations available in the "Geometry Graph" window. Thanks to TulipVorlax.

NOTE: Fixed some issues related to images of materials exported by POV-Ray plugin. Thanks to RyMopar that reported it.

NOTE: Fixed an error in the "wings_u:relative_path_name" routine that was rebuilding the full path in a wrong way.