rx is hardcoding an assembly name. workaround

obviously this will not work with ilmerging
removed constructor argument

since this class is internal. you can't pass args into it anyway.
bringing dependencies forward
no reason to target 4.5.1
shouldn't blow up here if the test is wonky
no reason for these not to be public
allow override of default behavior
Merge pull request #22 from thefringeninja/ilmerge-hell

rx is hardcoding an assembly name. workaround