Add EntryDictionary and EntryTwo

These are replacements for the original Dictionary and Entry so we could
motify without breaking previous students code.  Also added the unit
tests for each.
Merge branch 'master' of https://github.com/amnuxoll/EpMemHashing.git
Add EntryDictionary and EntryTwo

These are replacements for dictionary and Entry, so we could continue to
motify without breaking backwards compatibility.  Also added the JUnit
tests for both.