Merge pull request #212 from xtech86/master

Latest module info update,  Toolbar option to show top and bottom or bottom, iCal helper updates and Flat view missing img in nav fix.
Add safehtml filter to custom format string config option
use btn-danger for bootstrap no options more universally
uid defaults to 255 chars now
Skip setting DTEND for CSV import when its missing in the file
Merge origin/master
Added config option to Min Calendar module to allow disabling empty dates as links.