Adding new features to hapipy#40

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jpetr wants to merge 3 commits intoHubSpot:masterfrom

Commits on May 23, 2012

Adding contacts, groups, lists, and properties to hapipy. Adding two rough tests for contacts and lists to hapipy/test
jpetr
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Added conacts, lists, groups, and properties to hapipy. Also added rough tests for contacts and lists.
jpetr
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Commits on Jun 12, 2012

Implementing the suggestons of Nagro and Nick
jpetr
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