v2.6.2 (14 March 2015)

Bug Fixes

• fixed append_row and append_col to return the corect types [#1297]
• documentation fix: fixed generation of stan-functions.txt [#1327]
• changed constructor of stan::agrad::var so it can compile without
  C++11 [#1337, 1364]
• fixed bug in matrix double-indexing [#1342]
• fixed calculation of derivative in normal_cdf_log, normal_ccdf_log
  [#1357]

API Enhancements

• refactored math / autodiff library [#1222, #1349, #1353]
• fixed capitalization in tests [#1355]
• updated Eigen to 3.2.4 [#1173]