Merge pull request #14 from sebastiankliem/master

update data.js up to ss16; set ws12_13 as start
Merge pull request #15 from sebastiankliem/master

add missing commas
Merge pull request #16 from sebastiankliem/master

fix missings entries for ws13_14 and fix alphabetical order
Added more possible semesters up to "SS18".
update data for summer term 2014