Adding .DS_Store and .xcuserstate to .gitignore
Delete commented for avoiding bug
Change the Osirix file from 64 to 32 bits
Revert c75c3ca..3941ed6

This rolls back to commit c75c3cab29ef0d52aa2e7d37ef5eecec75e2c5e9.
adding .DS_Store to .gitignore
SymbolList added