J2N

Fixed `IndexOf()`, `LastIndexOf()`, `Contains()` and `Remove()` of `List<T>` to support negative zero vs positive zero to match the JDK (fixes #146) (#182)

Added AOT Trimming Support (#181)

J2N.Collections.Generic.HashSet<T>.CreateSetComparer(): Reverted breaking API change and removed superfluous HashSetEqualityComparer class. (#180)

J2N.MathExtensions.Log2(): Reverted legacy fallback implementation to use the same approach that was used in Lucene. The precomputed value was not the correct IEEE 754 rounded value and this is a more robust fix than trying to store the value in a constant. (#179)

Implemented navigable collection APIs in SortedSet<T> and SortedDictionary<TKey, TValue> (closes #9) (#178)