====== mergeNewPersonInXML(person, information_list, update_date, source) ======
===== Description =====
Merge new information into existing person's xml file.

===== Parameters =====
^  Parameter  ^  Necessity  ^  Type  ^  Description  ^
|  person  |  required  |  int  |  person id  |
|  information_list  |  required  |  list  |  the new information list that need to be added |
|  update_date  |  not required  |  string  |  date when updating the information  |
|  source  |  required  |  string  |  source of the information  |

===== Output =====
Person xml files with new added information.

===== Implementation =====
  - createAssetNode(): Create asset node which including income and finance subnodes.
  - createIncomeNode(): Create income node.
  - createFinanceNode(): Create finance node.
  - createNpidNode(): Create new pid node.
  - createRaceNode(): Create race node.
  - createPoliticalNode(): Create political node.
  - createTitleNode(): Create title node.
  - updateTLNode(): Update timeline node.
  - updateEduNode(): Update education node.
  - createMyTextNode(): Create text content for the node.

===== Related Work =====
XML DOM Tutorial http://www.w3schools.com/dom/