README formatting

Merge pull request#91 from alwinw/dev/stats-summaryDev/stats summary

Merge pull request#86 from alwinw/dev/figuresAmended figure legends and titles

Merge pull request#76 from alwinw/dev/first_cr_onlyAnalysis for first creatinine change only

Merge pull request#75 from alwinw/dev/cr_percentage_changeAdded additional cr change models

Merge pull request#66 from alwinw/dev/researchfestVirtual poster presentation