Added additional documentation.
Added additional documentation.

boland25/ResearchKit,weijentu/ResearchKit,YuanZhu-apple/ResearchKit,jeremiahyan/ResearchKit,cornelltech/ResearchKit,chb/ResearchKit,allen7wang/ResearchKit,shazino/ResearchKit,YuanZhu-apple/ResearchKit,jeremiahyan/ResearchKit,YuanZhu-apple/ResearchKit,weijentu/ResearchKit,cornelltech/ResearchKit,oliverschaefer/ResearchKit,oliverschaefer/ResearchKit,KaiCode2/ResearchKit,boland25/ResearchKit,YuanZhu-apple/ResearchKit,chb/ResearchKit,shazino/ResearchKit,shazino/ResearchKit,weijentu/ResearchKit,oliverschaefer/ResearchKit,mluedke2/ResearchKit,chb/ResearchKit,allen7wang/ResearchKit,md0u80c9/ResearchKit,boland25/ResearchKit,md0u80c9/ResearchKit,oliverschaefer/ResearchKit,cornelltech/ResearchKit,mluedke2/ResearchKit,allen7wang/ResearchKit,boland25/ResearchKit,KaiCode2/ResearchKit,weijentu/ResearchKit,md0u80c9/ResearchKit,mluedke2/ResearchKit,jeremiahyan/ResearchKit,chb/ResearchKit,KaiCode2/ResearchKit,md0u80c9/ResearchKit