Fix the two sequence's determination of equivalence in `ExpectSuccess`
Add Test
Fix `EndBy` parser
Merge branch 'master' into topic/issue#7
Fix issue #7

memorize enumerator/enumerable utility method `Extensions.Memoize` added
Happy New Year

modify Copyright
Remove unnecessary file
Merge branch 'master' into experimental
Update Assembly Version and Parseq.nuspec
fix code format
Remove `IDisposable` from Parseq.Stream<T>
Eliminate unnecessary definitions
Formatting code

uliminate unnecessary using
Merge branch 'master' into experimental