Refactoring. Added username to SessionInformation
Better logout, support for ObjectRequest, more dynamic design
Refactoring. Logif for get, add, remove groups

Made Request and responses generic to avoid unnecessary huge amount of
trivial classes.
Added Factory lass for group requests and appropriate tests.
Getting, Adding and removing groups works.
Searching does not work , yet, nor cmdlets that use the lagoic.
Refactoring. Added simple group cmdlets and tests.

Renamed "RequestData" directory and namespace to "Requests".
Renamed some test suites.
Introduced ODSNoun class to use instead of inline strings to avoid
typos.
Added cmdlets for simple group managment (adding, removing and getting
groups).
Tests for all cmdlets inclusively pipeline usage.
Corrected use of ShouldProcess()
Get group cmdlet allows queries.

Added possibility to query some groups.
Added missing test for delete group request
Renamed RequestHandlerTests to ConnectRequestTests, because that's what
it is.
Merge pull request #4 from sburnicki/object_requests

Object Requests & Simple Group Management Cmdlets