Ensured that the nil start reasons when pulling cohort report are handled effectively so that the should not cause the thread to abort
Defaulted patient state to Unknown, for patients having no program id (HIV Program)
added a patient_defaulted_dates model
added 'age_in_days' field
updated patient_defaulted_dates and also added patient_max_defaulted_date function
updated patient_max_defaulted_date function
updated patient_defaulted_dates model
added cohort_controller as part of bart2_cohort integration with bart2
updated change_log
added flat-table views to app
Merge branch 'master' of https://github.com/BaobabHealthTrust/bart2
Merge branch 'master' of https://github.com/BaobabHealthTrust/bart2

Conflicts:
	change_log.txt
Merge branch 'master' of https://github.com/BaobabHealthTrust/bart2
added flat_tables models
added flat tables button
modified applications_controller to accomodate the addition of flat tables cohort report
Merge branch 'master' of https://github.com/BaobabHealthTrust/bart2
fixed a layout issue
removed layout for cohort report
updated routes.rb to accommodate the additions of flat_tables routes