For the cohorts and the timepoints created new query files and associated xml meta data files

HAI_vs_GE.Rmd : added the dichotomization value and proper expression matrix to use for prediction

HAI_vs_GE.js :
- added the dichotomization value selection number field
- added a combo box and the logic for the proper selection of the cohort / expression matrix to use for prediction
- added key stroke listeners to the number field inputs
- added a validation function for checking the status of the RUN button (needs to be enabled or disabled)
- migrated to more flexible Store-s from Labkey