Add .gitignore file
Fix line feed code
Modify .gitignore file

Add Entry for ignoring auto-generated documents by Doxygen.
Change HOLD_LIFE flag to HOLD_EXP

HOLD_LIFE flag is changed to HOLD_EXP flag at 1e16b0f.
Add include header file 'wctype.h'
Remove excess arguments
Modify .gitignore file

Add entry for ignoring game data files that is auto generated.