The tuning for the song "Development" by Antoine Dufour is DADGCE... does this mean I have to tune the B string up a half step? I am a little worried about this because in the past.. when I tuned up the string breaks.
Yes, you have to tune it up. Just tune slowly and it shouldn't break. It doesn't break on my guitar. For me, usually only high E breaks after lots of tuning changes.
for me its usually the G.

"i broke my G string."
Anyone who thinks that music these days is dead doesn't listen to enough music.
B string never broke for me and i tune it up to C all the time, with antoine dufour DADGCE and JBT CGCGCE