Support Set<T> & Get<T> in ISessionCollection

[hishamco]

Provide a generic version of ISessionCollection.Set<T> and ISessionCollection.Get<T> which allow the developers to implement ISessionFormatter. Based on David Fowler suggestion we can plug BondSessionFormatter or ProtoBufSessionFormatter as well.
/cc @Tratcher

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[ghost]

When committing from Windows to GitHub or git in general: always a line-break at the end of each file, so the diff does not show this:

Read more on No newline before the end of file - Stackoverflow.
Note: it will not actually add that extra line in source-control (but just squash out the last \r)

[hishamco]

@jasonwilliams200OK I added two methods without adding or modifying line-break

[davidfowl]

Currently we're not comfortable making this part of the built in interface (even though they are extension methods). The current recommendation is to put something like this into your application code and use whatever serializer/deserialize best fits your needs. We might revisit this in the future.

[hishamco]

Thanks @davidfowl