modified credits.html

- added Hoffi1 / Ernst
renamed language strings

REF
#https://github.com/jemproject/JEM-Project/commit/0a77defe3ff23026a335566bcd31f3df18abb04f
modifid calendar.css

- applied text-align+word-break to eventcontent
module-wide:  added tooltip to date / created field customtooltip
modified calendar views

- changed input fields
- altered calendar.js (it's using a bit more JQuery)
- changed id names of eventcontent to get it more inline