Added the GetMemberActivity api method to the MailChimp Manager class

This executes the api method "lists/member-activity" which get the most recent 100 activities for particular list members.
Campaign Sections fix

Allow campaign sections to be specified (serialized) as a dictionary.
Campaign Creation fix / add

Fixed DataMember for BaseTemplateID.  Added CampaignCreateTrackingOptions class.
Exception handling adjustment

IMHO, the exception should present the true nature of the problem at the outermost layer if possible.  I was getting "500 Internal Server Error" as the primary message which wasn't helpful.  I mean it may help debug the API, but it won't help the end user debug their code.
MailChimpManager date helper functions

Provided helper functions to allow users to process DateTime's for use in the APIs.
Merge pull request #37 from AndrewKoransky/master

campaign adjustments - optional helper functions, optional exception handling change
Added static segment detail to lists/member-info responses
Moved StaticSegment.cs where it belongs in the project file
Merge pull request #39 from lfagan/master

Added static segment detail to list/member-info responses
Campaign Update method
Test for UpdateCampaign method
Merge pull request #41 from dazaris/master

Added GetMemberActivity and UpdateCampaign methods and tests
Updated README

Updated status with new numbers
Added last 'User' methods and unit tests
Updated README

Updated status
Added Interest Grouping / Group Calls
Merge pull request #42 from leowin/master

Added Interest Grouping / Group Calls
Updated README

Updated status counts
Updated README.md

Updated Quickstart to clarify and improved formatting
Rearranging & starting on campaign ready check