v2.16.0 (15 June 2017)

Bug Fixes

• Fix typo in cumulative_sum definition (#2288)
• Check input/output streams and give better errors when files are not found (#2227)
• Flush print outputs even in the face of a reject (#2311)

New User-Facing Features

• New categorical_logit_rng function (#517)
• New include mechanism for including stan code from other files (#2224)
• New mechanism for compiling standalone Stan functions (#2267)

New Internal Features

• New logging framework (#512)
• Resolve hessian() to call O(N) reverse-mode version (#2321)
• Change model to take in int seed for RNG instead of full RNG object (#2241)

Documentation

• Updates to the Gaussian Processes chapter in the manual (#2240)
• User manual updates for this release (#2265)