2.6.0

New:

• max, maxBy, min, minBy - find the largest or smallest item in any sequence.
• filterNot - filters by the complement of the predicate, e.g. where the filter function returns false, the values will be kept.
• setIn and removeIn for altering deep immutable structures.

Fixes:

• Object Hash will no longer be overridden if shared between multiple global contexts.
• Immutable sequences from different requires in the same environment interact correctly for toJS and equals.