Merge pull request #1 from nseewald1/master

Sync beta and master branches
Copy Edits, Bug Fixes, Image Updates

NEW: Collapsible "additional readings" section on home page
IMPROVEMENT: Reorganized UI flow to ask for outcome type before DTR
selection, etc.
IMPROVEMENT: Updated copy to be more consistent throughout the app
IMPROVEMENT: Updated images to replace "intermediate outcomes" with
"tailoring variables"
Tooltips and Bug Fixes

NEW: Tooltips describing input requirements for every input
NEW: Easter Egg for version number and last update
IMPROVEMENT: Text edits
IMPROVEMENT: Better code commenting
IMPROVEMENT: Tighter conditions to evaluate and enhanced error detection
& handling
DELETED: Compute effect size from means and SD
Effect Size Copy Edits

Changed wording for effect size description.
Merge pull request #2 from nseewald1/beta

Merge beta to master