correcting hebrew on splash screen
added funcion to remove illegal windows characters
Functions for checking if a ref is translated; update sheet stats script
Merge branch 'master' into hebCheckSplash

Conflicts:
	templates/static/splash.html
Fix footer background
Basic activity collapsing
fixing windows filename export
Fix order of Torah books in commentary list
Fix circular dependencies
Use copy instead of deepcopy for parse_ref cache; activity collapsing refinements
Activity Collapsing refinements
Show text version names on activity items
Don't mutate sections or toSections fields directly
Merge branch 'master' into collapse-activity
Add all Connections to a Source in Sheets
Let 'text info' activity filter match edits and adds
Add admin path for reseting cache
Fix reverting for hebrew texts
Merge branch 'collapse-activity'
Fix logic for getting more activity items