Add support for read-only collections.
 - Needs more tests.
 - Needs to support read-only dictionary.
Add support for read-only dictionaries.
 - Needs more tests.
Fix bugs in IsReadOnlyProperty & IsReadWriteProperty extension methods.
Convert arrays and read-only collection outside of ListSerializer.
And only if necessary.
This prevents converting to an array or ReadOnlyCollection unnecessarily and possibly erroneously.
Flesh out read-only collection tests.
Version bump.
Merge pull request #36 from QuickenLoans/read_only_collection

Support read-only collections and dictionaries