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