Def/TerrainDef complated.

Incompleted : Def/RecipeDef
Completed RecipeDef. More natural style in Japanese.
SkillNeedDef, WorkGiverDef completed.

+ bugfix : Keyed/Designators.xml
Add ThingDef files.
Translate some sentence.
Some bugfix
Merge pull request #10 from sgrastar/working-branch-alpha4

merge from Working branch alpha4. 
Last update for alpha4. Will be create new branch "alpha5"