Added inline to recover_memory() and free_memory() to avoid warnings in gcc
Removed unused variable match_index
Merge pull request #798 from stan-dev/feature/issue-796-unused-function-warning-gcc

Feature/issue 796 unused function warning gcc
Merge branch 'feature/issue-771-ode-solver' of https://github.com/stan-dev/stan into feature/issue-771-ode-solver
Merge branch 'develop' of https://github.com/stan-dev/stan into feature/issue-771-ode-solver
replaced eigen types with std::vector in solve_ode