v2.6.1 (3 March 2015)

Language Enhancements

• improved warning messages from the parser [#1244]

API/Build/Test Enhancements

• the C++ API now throws 3 types of exceptions [#685]
• parts of the C++ API were rearranged (gm, common) [#942]
• replace promote_args
• allow reading from a local makefile outside of the code repository [#1277]
• added gradient of hessian functional in C++ [#1272]
• supressed printing of adjoints when printing stan::agrad::var [#330]
• removed some cpplint warnings [#1282]
• removed doxygen warnings [#1290]
• reimplemented fmix and fmax [#1311]

Bug Fixes

• allow nested indexes to compile with integrate_ode [#1317]

Documentation

• fixed typos in MCMC sampling