Cleaned up .gitignore
Cleaned up .gitignore


Former-commit-id: 28fcf9fa5788f23e4808f3ba1da5011a0d4a1699 [formerly 6463c5d5b1281e0c973604a330f5a650cbccc9a3]
Former-commit-id: 90eb0f305462ecd20b195d97469f3abb2fb09b40
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine