Improved implementation of FullOuterJoin to avoid multiple enumeration of
input sequences
Replaced multiple overloads of LeftOuterJoin/RightOuterJoin with optional
parameters; improved readability of LeftOuterJoin
Simplified some tests; removed AssertExtensions
Added tests for ChainedWith; removed methods with dummy parameters
Completed test coverage of XComparer
Fixed some R#/NDepend warnings
Excluded some classes from test coverage